The scientist's discovery (A) / had a profound affect (B) / on the field of (C) / molecular biology. (D)

• A. The scientist's discovery
• B. had a profound affect (Answer)
• C. on the field of
• D. No error

AFFECT vs EFFECT: 'Affect' is a verb (to influence); 'Effect' is a noun (a result). 'A profound affect' uses a noun slot but puts the verb form. Correct: 'a profound effect on'. This is one of the most tested confused word pairs in all competitive exams.

The principal (A) / and his staff held (B) / a candid discussion (C) / on the declining academic standards. (D)

• A. The principal
• B. and his staff held
• C. a candid discussion
• D. No error (Answer)

CLEAN SENTENCE: 'Principal' (head of institution) is correctly used. 'Held a discussion' is a correct collocation. 'Candid' (frank/open) correctly modifies 'discussion'. This tests whether students confuse 'principal' with 'principle' — but in context, 'principal' as a noun is correct here.

The minister's latest remarks (A) / have further aggravated (B) / the already tensed (C) / relationship between the two nations. (D)

• A. The minister's latest remarks
• B. have further aggravated
• C. the already tensed (Answer)
• D. No error

COLLOCATION ERROR: 'Tensed' is not a standard adjective for describing diplomatic/emotional situations. The correct adjective is 'tense'. 'Tensed' means physically tightened muscles. Correct: 'the already tense relationship'. Students often add '-d' to adjectives, thinking it makes them more formal.

His decision to immigrate (A) / to Canada was influenced (B) / by the desire (C) / for better professional opportunities. (D)

• A. His decision to immigrate (Answer)
• B. to Canada was influenced
• C. by the desire
• D. No error

EMIGRATE vs IMMIGRATE: 'Emigrate' = to leave your country; 'Immigrate' = to enter another country. The sentence describes the action from his home country perspective (leaving). Correct: 'decision to emigrate to Canada'. From Canada's perspective, he immigrates — but the sentence describes his personal decision from origin.

The company was forced (A) / to lay off two hundred workers (B) / owing to the continual (C) / decline in market demand. (D)

• A. The company was forced
• B. to lay off two hundred workers
• C. owing to the continual (Answer)
• D. No error

CONTINUAL vs CONTINUOUS: 'Continuous' means unbroken/without pause; 'continual' means recurring with brief intervals. A market decline is typically a steady, uninterrupted trend — 'continuous decline' is more precise. However, if the decline was intermittent, 'continual' may apply. For competitive exams, 'continuous' is the expected answer here.

He was reluctant to accept (A) / that his long-held beliefs (B) / were fundamentally wrong (C) / and needed to be revised. (D)

• A. He was reluctant to accept
• B. that his long-held beliefs
• C. were fundamentally wrong
• D. No error (Answer)

CLEAN SENTENCE: 'Reluctant to accept that' is correct. 'Long-held beliefs' is a valid compound adjective. 'Fundamentally wrong' is a correct collocation. 'Needed to be revised' is passive infinitive used correctly. No error — a clean sentence amid 9 error-filled ones in this set.

Despite working (A) / for fifteen years in the field, (B) / he still lacks (C) / the practical knowledge to compliment his theoretical expertise. (D)

• A. Despite working
• B. for fifteen years in the field,
• C. he still lacks
• D. the practical knowledge to compliment his theoretical expertise (Answer)

COMPLEMENT vs COMPLIMENT: 'Compliment' means to praise or say something admiring. 'Complement' means to complete or enhance something. 'Practical knowledge' enhances ('complements') theoretical expertise — it doesn't praise it. Correct: 'to complement his theoretical expertise'.

The council passed (A) / a resolution to comprise (B) / a five-member committee (C) / to investigate the irregularities. (D)

• A. The council passed
• B. a resolution to comprise (Answer)
• C. a five-member committee
• D. No error

COMPRISE vs CONSTITUTE/FORM: 'Comprise' means 'to consist of' or 'to include'. You cannot 'comprise a committee' — you 'constitute/form a committee'. Also, 'comprise' takes the whole as subject: 'The committee comprises five members', not the reverse. Correct: 'a resolution to form/constitute a five-member committee'.

The accused person (A) / was acquitted from (B) / all charges (C) / by the honourable court. (D)

• A. The accused person
• B. was acquitted from (Answer)
• C. all charges
• D. No error

PREPOSITION WITH 'ACQUIT': The correct preposition is 'acquitted of', not 'acquitted from'. 'Acquitted of all charges' is the fixed legal collocation. Students confuse it with 'freed from' and substitute 'from'. This is tested heavily in legal-context error spotting questions.

The army personal (A) / were commended (B) / for their exceptional bravery (C) / during the border conflict. (D)

• A. The army personal (Answer)
• B. were commended
• C. for their exceptional bravery
• D. No error

PERSONNEL vs PERSONAL: 'Personnel' means staff/employees (plural noun); 'personal' is an adjective meaning private/individual. 'Army personal' is incorrect — it needs the noun 'personnel'. Correct: 'The army personnel were commended'. A classic spelling-level vocabulary trap.