Spelling selection — Identify the correctly spelled word for formal English: choose the standard form of "Indispensable" from the given alternatives for exams, editing, and proofreading practice.

Given data

• Word intended: "Indispensable" (meaning absolutely necessary).
• Options: Indipensable; Indipenseble; Indispansible; Indispensable

Concept/Approach
The correct Latin-derived stem is "dispense" → "indispensable" with vowel sequence "i-n-d-i-s-p-e-n-s-a-b-l-e".

Step-by-step reasoning
Indispensable — correct spelling with "pen" and "able".Indipensable — wrong vowel "i" after "d" and missing "s": should be "dis".Indipenseble — incorrect "seble" and wrong vowel pattern.Indispansible — incorrect "span" cluster; adds "an".

Verification/Alternative
Authoritative dictionaries confirm "indispensable".

Common pitfalls
Confusing "-able" placement and inserting extra vowels.

Final Answer
Correct spelling: Indispensable.