Select the correct option:
The biochemist insisted__________conducting a double-blind trial before publication.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. on.
Grammatical Concept/Meaning:
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Insist + On: The verb "insist" is strictly followed by the preposition "on" when it is followed by a Gerund (V1 + ing) or a Noun.
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Structure: Subject + insist(s/ed) + on + Gerund.
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Example: "She insisted on paying the bill."
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Insist + That: Alternatively, "insist" can be followed by a "that-clause" (often using the subjunctive mood).
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Example: "The biochemist insisted that a double-blind trial be conducted."
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Incorrect Usage: "Insist for" is a common error derived from other languages, but it is never used in standard English. "Insist to" is also incorrect when followed by an action.
Final Sentence: The biochemist insisted on conducting a double-blind trial before publication.
Hence, the chosen option is correct.