Error spotting (bank/SSC direction): Identify the erroneous segment (A/B/C) in the sentence — mark D if there is no error — 'At the end of the year / every student who had done adequate work / was automatically promoted. / No error.' Carefully evaluate subject–verb agreement, clause tense, and determiners.

Given data

• A. At the end of the year
• B. every student who had done adequate work
• C. was automatically promoted.
• D. No error.

Concept/Approach
Check (i) subject–verb agreement: singular head 'every student' → singular verb 'was'; (ii) tense sequencing: past perfect ('had done') for prior work before the promotion event; (iii) modifiers: prepositional opener is fine.

Step-by-step validation
1) Head noun = 'every student' → singular → 'was' is correct.2) Prior action 'had done adequate work' before promotion → past perfect is appropriate.3) No punctuation/idiom issues affecting grammar.

Common pitfalls
Replacing 'was' with 'were' (incorrect with 'every').

Final Answer
D — No error.