Question 1

Analogy — Map head of polity at two scales: India : President :: State : ?

Accepted Answer

Introduction / Context:The first pair names the constitutional head of the Union (India). We must identify the analogous constitutional head at the state level within the Indian federal system. Given Data / Assumptions: At the Union level, the President is the head of state. At the state level, the Governor is the constitutional head. Chief Minister and Prime Minister are heads of government, not heads of state. Concept / Approach:Preserve “polity → constitutional head of state,” keeping the governance tier parallel. Step-by-Step Solution:India → President (head of state).State → ? → Governor (head of state at state level). Verification / Alternative check:Indian Constitution: Articles 52 (President) and 153 (Governor) establish these roles as heads of state at their respective levels. Why Other Options Are Wrong:(a) Prime Minister – Union head of government.(c) Chief Minister – state head of government.(d) Mayor – local government head. Common Pitfalls:Confusing head of government with head of state; analogy requires the same constitutional category. Final Answer:Governor

Question 2

Analogy — Map substance to its Earth system sphere: Air : Atmosphere :: Water : ?

Accepted Answer

Introduction / Context:Earth system science groups components into “spheres.” Air belongs to the atmosphere. We must choose the analogous sphere for water. Given Data / Assumptions: Atmosphere → air and gases. Hydrosphere → water in all forms (oceans, rivers, lakes, ice as part of the cryosphere subset). Biosphere → living organisms; stratosphere is one layer of the atmosphere; ecosphere may be used broadly for the total ecosystem but is not the standard sphere for water. Concept / Approach:Preserve “material → principal Earth sphere.” Step-by-Step Solution:Air → atmosphere.Water → ? → hydrosphere. Verification / Alternative check:Standard classification: lithosphere (rock), hydrosphere (water), atmosphere (air), biosphere (life). Why Other Options Are Wrong:(b) Ecosphere – broad ecological concept; not specific to water.(c) Biosphere – life, not water.(d) Stratosphere – a subset of atmosphere; still about air/gases. Common Pitfalls:Choosing a term that sounds “eco-related” rather than the scientifically precise sphere. Final Answer:Hydrosphere

Question 3

Analogy — Map specific to class: Steel : Alloy :: Zinc : ?

Accepted Answer

Introduction / Context:The pair “Steel : Alloy” maps a specific material to its class. We must classify zinc correctly to mirror this taxonomic relation. Given Data / Assumptions: Steel is an alloy (primarily iron with carbon and other elements). Zinc (Zn) is a metallic element (post-transition metal by some categorizations). Salt and halogen are different chemical classes; non-metal is incorrect for zinc. Concept / Approach:Preserve “instance → class.” Do not switch to functional compounds or periodic groups that do not match the instance given. Step-by-Step Solution:Steel → alloy (class).Zinc → ? → metal (class). Verification / Alternative check:Periodic table classification: zinc is a metal; salts are compounds formed by acid–base reactions; halogens are Group 17 non-metal elements. Why Other Options Are Wrong:(b) Non-metal – incorrect classification of zinc.(c) Salt – a compound category, not an elemental class for zinc.(d) Halogen – different periodic group; zinc is not halogen. Common Pitfalls:Confusing common compounds containing zinc (zinc salts) with zinc’s elemental classification. Final Answer:Metal

Question 4

Analogy — Map medium to conduit: Electricity : Wire :: Water : ?

Accepted Answer

Introduction / Context:Electricity travels through a conductor; in household and industrial contexts that conductor is a wire. We must choose the corresponding conduit for water transport in analogous engineered systems. Given Data / Assumptions: Wire conducts electricity. Pipe conveys water through systems. River is a natural channel; jug/bottle are containers, not conduits. Concept / Approach:Preserve “medium → engineered conduit.” Avoid natural channels or storage vessels. Step-by-Step Solution:Electricity → wire (conduit).Water → ? → pipe (conduit). Verification / Alternative check:Both wire and pipe are standardized infrastructure components for distribution of their respective media. Why Other Options Are Wrong:(b) River – natural geography, not engineered conduit.(c) Jug, (d) Bottle – containers, not conveyance infrastructure. Common Pitfalls:Picking a storage item rather than the flow pathway. The original pair is about transmission, not storage. Final Answer:Pipe

Question 5

Analogy — Map overseer/lead role by medium: Conference : Chairman :: Newspaper : ?

Accepted Answer

Introduction / Context:A chairman presides over a conference. In publishing, the role that presides over content and issues final decisions is the editor (specifically, editor-in-chief). We must mirror “event/publication → presiding authority.” Given Data / Assumptions: Chairman oversees proceedings of a conference. Editor oversees content and publication decisions for a newspaper. Reporter gathers news; printer handles printing; distributor handles circulation. Concept / Approach:Preserve “institution/medium → presiding authority.” Select the role with ultimate editorial control analogous to chairing/moderating. Step-by-Step Solution:Conference → chairman.Newspaper → editor. Verification / Alternative check:Industry structure: editor-in-chief sets standards and finalizes content—the closest analogue to a chairman’s presiding function. Why Other Options Are Wrong:(a) Reporter – contributor; (b) Distributor – logistics; (c) Printer – production, not content control. Common Pitfalls:Choosing a visible contributor (reporter) instead of the presiding decision-maker (editor). Final Answer:Editor

Question 6

Analogy — Map animal to typical dwelling: Lion : Den :: Rabbit : ?

Accepted Answer

Introduction / Context:“Lion : Den” pairs an animal with its characteristic dwelling. We must choose the standard term for a rabbit’s dwelling to mirror this relation precisely. Given Data / Assumptions: Lions live in dens. Rabbits live in burrows (interconnected tunnels). Other terms are generic holes/depressions, not the zoologically standard name. Concept / Approach:Preserve “animal → conventional dwelling term.” Avoid generic nouns that do not specify the species-typical habitat name. Step-by-Step Solution:Lion → den.Rabbit → ? → burrow. Verification / Alternative check:Common vocabulary lists: rabbit→burrow/warren. “Burrow” is the canonical single-word dwelling term. Why Other Options Are Wrong:(a) Trench – man-made or war feature.(b) Hole – generic; lacks species specificity.(c) Pit – natural depression; not a rabbit's structured dwelling. Common Pitfalls:Picking a generic “hole” instead of the recognized dwelling term used in aptitude exams. Final Answer:Burrow

Question 7

Analogy — Map equal day-gap forward in the week: Monday : Saturday :: Thursday : ?

Accepted Answer

Introduction / Context:Day-of-week analogies often encode a fixed forward (or backward) gap. From Monday to Saturday is a forward movement of 5 days: Tue(1), Wed(2), Thu(3), Fri(4), Sat(5). We must apply the same gap to Thursday. Given Data / Assumptions: Mapping uses a +5 day step in the weekly cycle. Week wraps cyclically after Sunday to Monday. Compute Thursday + 5 days. Concept / Approach:Translate the difference numerically and apply to the new base day, taking care with wraparound if needed. Step-by-Step Solution:Compute +5 from Thursday: Fri(1), Sat(2), Sun(3), Mon(4), Tue(5).Therefore, the corresponding day is Tuesday. Verification / Alternative check:Check inverse: Tuesday − 5 days → Thu, confirming the consistent offset. Why Other Options Are Wrong:(a) Sunday – +3 from Thursday.(c) Wednesday – −1 from Thursday.(d) Friday – +1 from Thursday. Common Pitfalls:Miscalculating the forward count (counting Thursday as day 1 instead of the next day). Always count after the starting day. Final Answer:Tuesday

Question 8

Analogy — Disease : Medicine :: Famine : ? Select the option that stands to “famine” the way “medicine” stands to “disease” (i.e., a typical remedy or alleviating factor).

Accepted Answer

Introduction / Context:The pair “Disease : Medicine” expresses a remedy–problem relationship in which the second term (medicine) commonly treats or alleviates the first (disease). To preserve the same logic, we need an option that typically alleviates or resolves the condition of a famine. Given Data / Assumptions: Disease is commonly treated with medicine (remedy relationship). Famine is a prolonged scarcity of food, often linked to crop failure and lack of rain. The correct choice should be a standard alleviator or remedy for famine conditions. Concept / Approach:Map the relation as “problem → remedy.” Check which alternative is a conventional mitigator of famine. Avoid causes of famine or items only indirectly related. Prioritize the factor that directly enables food production to resume at scale. Step-by-Step Solution: Identify the structure: disease (problem) : medicine (remedy).Apply to famine: famine (problem) : ? (remedy).Rainfall revitalizes agriculture, replenishes water, and supports food production, thereby alleviating famine.Clouds (without rain) are not sufficient; drought is a cause, not a remedy; a river may help locally but is not the standard broad remedy like seasonal rain. Verification / Alternative check:Historically and in agronomy, timely and adequate rainfall restores crop yields and food supply, directly addressing famine drivers such as failed monsoons or prolonged dry spells. Why Other Options Are Wrong: Clouds — do not guarantee precipitation; insufficient as a remedy. Drought — a principal cause of famine, not a solution. River — can aid irrigation regionally but lacks the widespread corrective effect of rainfall. Common Pitfalls:Confusing a cause (drought) or an associated phenomenon (clouds) with an actual remedy. The analogy demands the counterpart that resolves the condition. Final Answer:Rainfall

Question 9

Analogy — Coal : Heat :: Wax : ? Choose the option that represents the principal output we typically associate with wax when used as a candle.

Accepted Answer

Introduction / Context:“Coal : Heat” is a source–product relation under usual usage: burning coal is commonly associated with producing heat (and also light, but heat is the canonical association). The question asks for a similar association with wax in everyday practice, i.e., what we chiefly obtain when wax is used in a candle. Given Data / Assumptions: Coal (source) → heat (principal output in domestic/industrial use). Wax in candle form → light (the expected, defining output). We prioritize the normal, defining association, not peripheral by-products. Concept / Approach:Identify the dominant effect that characterizes the second pair. While burning wax also releases heat, culturally and functionally the candle’s purpose is “light,” just as coal is commonly tied to “heat.” “Candle” is an object, “bee” is a biological source of some wax types; “energy” is too generic. Step-by-Step Solution: Map: coal → heat (typical product in usage).For wax: the typical product when used as a candle is light.Discard object or source terms (“candle,” “bee”) and overly broad abstractions (“energy”). Verification / Alternative check:Everyday language encodes these pairs: coal-for-heat, candles-for-light. Hence “wax : light” mirrors the same intuitive linkage. Why Other Options Are Wrong: Energy — too general; does not mirror the specific, culturally salient output. Candle — instrument rather than output. Bee — biological origin of some waxes, not the produced effect. Common Pitfalls:Choosing a related object (candle) instead of the outcome (light). The prompt seeks the characteristic result. Final Answer:Light

Question 10

Analogy — Blind : Visual :: Deaf : ? Pick the term related to “deaf” in the same way that “visual” relates to “blind” (i.e., pertaining to the corresponding sense domain).

Accepted Answer

Introduction / Context:The pair “Blind : Visual” links a condition (blindness) to the sense domain it concerns (visual domain). In the same fashion, for “deaf,” we want the adjective that designates the corresponding sense domain (hearing). Among the candidates, one is the precise adjectival form that mirrors “visual.” Given Data / Assumptions: “Visual” is the adjectival form relating to sight/vision. We seek the adjectival counterpart for the hearing sense domain. Distinguish nouns (hearing, sound) and activities (listening) from the required adjective. Concept / Approach:Ensure part-of-speech and semantic role consistency: the stimulus uses an adjective (“visual”), so the response should also be an adjective that names the relevant sensory domain for “deaf.” This keeps the analogy precise and structurally parallel. Step-by-Step Solution: Identify POS: “visual” = adjective.Hearing-domain adjective = “auditory.”Reject “hearing” (noun/gerund), “sound” (noun), and “listening” (activity), which break parallelism. Verification / Alternative check:Dictionaries define “auditory” as “relating to the sense of hearing,” directly mirroring “visual” for the sense of sight. Why Other Options Are Wrong: Sound — a stimulus, not an adjective for the sense domain. Hearing — noun; not parallel to “visual.” Listening — action of attending to sound; not the domain adjective. Common Pitfalls:Overlooking grammatical parallelism and picking a semantically related but grammatically mismatched term. Final Answer:Auditory

Question 11

Analogy — India : New Delhi :: Pakistan : ? Choose the capital city of Pakistan to preserve the country–capital relationship.

Accepted Answer

Introduction / Context:This is a straightforward country–capital mapping. As “India : New Delhi,” the parallel for Pakistan is the name of its capital city. Knowledge of world capitals is a common verbal–GK test item, so accuracy and up-to-date information are key. Given Data / Assumptions: India’s capital is New Delhi. Pakistan’s capital is Islamabad. Other large Pakistani cities (e.g., Lahore, Rawalpindi, Peshawar) are not the capital. Concept / Approach:Confirm the official capital. Avoid distractors that are historically significant or populous but not capitals. The analogy requires the same relationship (country → capital). Step-by-Step Solution: Identify relationship: Country → Capital.India → New Delhi; therefore Pakistan → Islamabad.Eliminate Lahore (cultural hub), Rawalpindi (adjacent garrison city), Peshawar (provincial capital); none is the national capital. Verification / Alternative check:Standard atlases and reputable references list Islamabad as the capital of Pakistan. Why Other Options Are Wrong: Rawalpindi — important city, not the capital. Peshawar — provincial capital of Khyber Pakhtunkhwa. Lahore — capital of Punjab province; not the national capital. Common Pitfalls:Confusing the largest or historically prominent city with the national capital. Final Answer:Islamabad

Question 12

Analogy — Carpenter : Saw :: Tailor : ? Pick the tool that stands to a tailor the way a saw stands to a carpenter.

Accepted Answer

Introduction / Context:Here the first pair shows a profession linked with a characteristic tool: a carpenter commonly uses a saw. We need to mirror this with the tailor’s characteristic hand tool among the options provided. Given Data / Assumptions: Carpenter → saw (tool). Tailor → needle (tool) is a classic pairing (often with thread). Eliminate processes (“sewing”), materials (“cloth”), or abstractions (“measurement”). Concept / Approach:Preserve type consistency: profession → tool. While tailors may also use machines, the needle remains the emblematic tool corresponding to “saw” for a carpenter. Step-by-Step Solution: Identify the relation: profession to its hand tool.Tailor’s iconic tool is the needle.Discard non-tool options such as actions, materials, or general concepts. Verification / Alternative check:Common-knowledge associations in language and imagery (e.g., tailor’s needle and thread) support this mapping. Why Other Options Are Wrong: Measurement — a task, not a tool. Sewing — an action/process. Cloth — material worked upon, not the tool. Common Pitfalls:Confusing process or material with the instrument required by the analogy. Final Answer:Needle

Question 13

Analogy — Bird : Fly :: Snake : ? Select the option that names the characteristic mode of locomotion for a snake, just as flying is for many birds.

Accepted Answer

Introduction / Context:“Bird : Fly” pairs an animal with its characteristic movement. While not all birds fly, flight is their defining locomotion. We need the corresponding locomotion verb for snakes to sustain the animal–movement relationship. Given Data / Assumptions: Bird → fly is a canonical association. Snake’s characteristic locomotion is crawling (also described as slithering). We want a movement verb, not a place or unrelated action. Concept / Approach:Match semantic category (animal → movement). Ensure the second term is an appropriate motion verb widely attributed to snakes. Eliminate nouns/locations and unrelated actions. Step-by-Step Solution: Confirm “crawl/slither” as the standard motion for snakes.Discard “hole” (a place), “clatter” (sound), and “stroll” (human gait, wrong connotation). Verification / Alternative check:Basic zoological descriptions label snake locomotion as slithering or crawling along the ground using abdominal scales and muscle waves. Why Other Options Are Wrong: Hole — habitat/feature, not motion. Clatter — a noise, not movement. Stroll — leisurely human walk; not applied to snakes. Common Pitfalls:Picking a habitat or onomatopoeic term instead of the motion verb demanded by the analogy. Final Answer:Crawl

Question 14

Analogy — Plant : Tree :: Girl : ? Choose the term that represents the mature stage of “girl,” just as “tree” is the mature stage of “plant.”

Accepted Answer

Introduction / Context:The first pair presents a developmental transition: plant (young stage) to tree (mature stage). We need the corresponding mature stage for “girl” in human development to preserve the age-based progression relationship. Given Data / Assumptions: Plant → tree indicates biological maturation. Girl → woman indicates human maturation from juvenile to adult female. Other options are role-based (wife, mother, sister) and do not necessarily follow from age alone. Concept / Approach:Keep the analogy strictly on the axis of biological/age progression rather than social roles or relationships. The correct term should mark adulthood irrespective of marital or familial status. Step-by-Step Solution: Map the transition: juvenile → adult.Girl (juvenile female) → woman (adult female).Exclude roles dependent on relationships (wife, mother) or kinship labels (sister). Verification / Alternative check:Standard usage in biology and sociology distinguishes “girl” (child/teen) from “woman” (adult), mirroring plant→tree. Why Other Options Are Wrong: Wife — marital status, not age stage. Mother — parental role, not guaranteed by age alone. Sister — kinship role, independent of maturity level. Common Pitfalls:Confusing social roles with biological maturation stages. Final Answer:Woman

Question 15

Analogy — Traveller : Journey :: Sailor : ? Select the term that names the typical expedition or travel undertaken by a sailor, paralleling traveller–journey.

Accepted Answer

Introduction / Context:“Traveller : Journey” links an agent with the activity undertaken. The parallel for a sailor is the term that denotes the travel/expedition by sea. This is a standard agent–activity pairing in vocabulary questions. Given Data / Assumptions: Traveller → journey (activity). Sailor → voyage (sea journey/activity). Eliminate medium (“water”), vehicle (“ship”), or group (“crew”) since the analogy calls for activity. Concept / Approach:Maintain category alignment: both right-hand terms should be activities, not objects or collectives. “Voyage” is the natural activity noun for a sailor’s travel by sea. Step-by-Step Solution: Identify the agent–activity relation.Map sailor → voyage, analogous to traveller → journey.Discard non-activity options (medium, vehicle, crew). Verification / Alternative check:Usage in literature and common speech consistently pairs “sailor” with “voyage.” Why Other Options Are Wrong: Water — medium, not an activity. Ship — vehicle, not an activity. Crew — group of people, not an activity. Common Pitfalls:Picking a closely related noun (ship) instead of the activity noun demanded by the analogy. Final Answer:Voyage

Question 16

Analogy — Flow : River :: Stagnant : ? Choose the water body/state that typically corresponds to “stagnant,” as “flow” corresponds to “river.”

Accepted Answer

Introduction / Context:The word “flow” is characteristically associated with rivers, streams, and moving water. The analogy asks for the counterpart of “stagnant,” which describes water that does not move. We need the natural pairing where stillness is expected. Given Data / Assumptions: Flow → river (moving water). Stagnant → pool (typically still water). Canals and streams are engineered or natural channels with flow; “river” again implies movement. Concept / Approach:Maintain the property–example structure: property (flow) → exemplar (river) and property (stagnant) → exemplar (pool/pond). Pick the option that canonically embodies still water. Step-by-Step Solution: Identify the mapping as property → typical instance.Moving water → river; still water → pool.Eliminate options that denote flowing channels (canal, stream) or repeat “river.” Verification / Alternative check:Dictionaries and hydrology basics associate “stagnant” with pools/ponds where water circulation is minimal. Why Other Options Are Wrong: Canal — designed for flow; not naturally stagnant. Stream — flowing watercourse. River — already mapped with “flow,” not with stagnation. Common Pitfalls:Choosing a watercourse term that implies motion rather than stillness. Final Answer:Pool

Question 17

Analogy — Ink : Pen :: Blood : ? Pick the option that stands to “blood” as a conduit or carrier, analogous to how a pen carries or contains ink.

Accepted Answer

Introduction / Context:“Ink : Pen” captures a container/conduit relationship: a pen holds and delivers ink. For blood, we need the bodily structure that contains and conducts it. Among the options, only one names the anatomical conduit for blood. Given Data / Assumptions: Pen carries/dispenses ink. Blood is carried within vessels (arteries and veins). The option should be a conduit, not an event, role, or action. Concept / Approach:Preserve the carrier–content relation. In human anatomy, “vein” and “artery” are the principal conduits. Since only “vein” appears, it is the appropriate analogue for “pen” with respect to “blood.” Step-by-Step Solution: Identify relation: content → conduit (ink → pen).Map to physiology: blood → vein (also arteries, but not offered).Eliminate non-conduit options such as “donation,” “accident,” or “doctor.” Verification / Alternative check:Basic biology: veins return blood to the heart; arteries carry blood away. The presence of “vein” makes it the correct conduit counterpart. Why Other Options Are Wrong: Donation — an act, not a vessel. Accident — an event. Doctor — a person/profession, not a carrier. Common Pitfalls:Selecting a contextually related term (doctor) instead of the structural carrier demanded by the analogy. Final Answer:Vein

Question 18

Analogy — Nature : Neglect :: Denigrate : ? (Recovery-First fix: “Nature : Neglect” is clearly intended as the antonymic pair “Nurture : Neglect”. Preserve the relation as opposite/contrary and map “Denigrate” to its antonym.)

Accepted Answer

Introduction / Context:The prompt shows “Nature : Neglect :: Denigrate : ?”. This looks malformed because “nature” is not the opposite of “neglect.” A well-known antonymic pair is “nurture : neglect.” Applying the Recovery-First Policy, we minimally repair the stem to “Nurture : Neglect,” preserving the intended antonym relationship, and then mirror that relation for “Denigrate.” Given Data / Assumptions: Goal: keep the opposition/antonym structure intact. “Nurture” (to care for) vs “neglect” (to fail to care for) are standard antonyms. “Denigrate” means to belittle, defame, or disparage. We seek the conventional opposite of “denigrate.” Concept / Approach:Identify the semantic relation (antonymy) in the corrected first pair. Then, for “denigrate,” choose the lexical opposite that conveys praise or elevation of reputation. Among options, “extol” means “to praise enthusiastically,” which stands opposite to “denigrate.” “Calumniate” is a near-synonym of denigrate (to slander), and the others do not express praise as a direct antonym. Step-by-Step Solution: Repair pair: “nurture : neglect” → antonyms.Map second pair with same relation: “denigrate : ?” → antonym needed.Select “extol” (to laud, praise) as the natural opposite of “denigrate.” Verification / Alternative check:Standard dictionaries: denigrate = disparage/defame; extol = praise highly. They are used as contraposed verbs in writing about reputation or evaluation. Why Other Options Are Wrong: Reveal — means uncover; not an antonym of disparage. Recognize — to acknowledge; not the opposite of belittle. Calumniate — to slander; this is a synonym of denigrate, not its opposite. Common Pitfalls:Accepting the flawed “nature : neglect” or choosing a synonym (“calumniate”) instead of a true opposite. The analogy must preserve relation type, not merely topical association. Final Answer:Extol

Question 19

Analogy — Chlorophyll : Plant :: Haemoglobin : ? Choose the biological counterpart carried within living organisms that parallels chlorophyll in plants.

Accepted Answer

Introduction / Context:Chlorophyll is a characteristic pigment associated with plants; it enables photosynthesis. In a similar structural mapping, haemoglobin is the characteristic oxygen-carrying protein associated with blood in animals, particularly vertebrates. The analogy therefore pairs the biological substance with its primary biological milieu. Given Data / Assumptions: Chlorophyll ↔ plant tissues (chloroplasts), defining association. Haemoglobin ↔ blood (in red blood cells), defining association. We seek the domain/body in which haemoglobin normally resides. Concept / Approach:Maintain “substance : natural locus” structure. Chlorophyll is not “photosynthesis,” but a pigment found in plants; likewise haemoglobin is not “oxygen” (which it carries) nor “red” (a color), but a protein in blood. Hence, “blood” mirrors “plant” as the locus for haemoglobin. Step-by-Step Solution: Identify relation: characteristic substance → typical location/domain.Map to animals: haemoglobin → blood (in RBCs).Reject distractors that confuse function (oxygen) or properties (red) with the locus. Verification / Alternative check:Biology basics: haemoglobin within erythrocytes binds oxygen for transport; its presence colors blood red in most vertebrates. Why Other Options Are Wrong: Haemorrhage — bleeding event, not a locus. Oxygen — transported by haemoglobin, not the container/location. Red — color attribute, not the biological medium. Common Pitfalls:Choosing a function/object (oxygen) or attribute (red) rather than the hosting medium (blood), which is required to match the first pair’s logic. Final Answer:Blood

Question 20

Analogy — Bread : Yeast :: Curd : ? Select the microorganism typically responsible for curd formation, analogous to yeast in bread making.

Accepted Answer

Introduction / Context:In food technology, bread rises due to yeast (a fungus) fermenting sugars and producing carbon dioxide. For curd (yogurt), the typical agents are lactic acid bacteria (e.g., Lactobacillus spp.) that ferment lactose to lactic acid, coagulating milk proteins. The analogy matches “product : characteristic microbe.” Given Data / Assumptions: Bread : yeast (microbial agent). Curd : lactic acid bacteria (microbial agent). We need the specific category that makes curd, not a vague or incorrect class. Concept / Approach:Preserve the “food item : principal microorganism” relation. While yeast are fungi, curd is not typically produced by fungi or viruses. “Germs” is imprecise. The correct, standard class is “bacteria.” Step-by-Step Solution: Identify mapping type: product ↔ microbe used.Bread ↔ yeast (fungus). Curd ↔ lactic acid bacteria.Choose “Bacteria” as the precise agent category. Verification / Alternative check:Dairy science references consistently attribute curd/yogurt fermentation to bacterial cultures (e.g., Lactobacillus bulgaricus, Streptococcus thermophilus). Why Other Options Are Wrong: Fungi — describes yeast but not the typical agents for curd. Germs — non-technical catch-all; lacks specificity. Virus — not used in curd formation. Common Pitfalls:Generalizing from bread (fungus) and assuming the same kingdom for curd; food fermentations vary in agent type. Final Answer:Bacteria

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