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    Question

    In each of the questions, a sentence has been divided

    into four parts, one of which may contain an error. Identify that fragment and mark it as your answer. The scientist's groundbreaking research not only (A)/ advanced our understanding of quantum physics (B)/ but also has practical applications in various industries. (C)
    A B Correct Answer Incorrect Answer
    B C Correct Answer Incorrect Answer
    C A Correct Answer Incorrect Answer
    D No error Correct Answer Incorrect Answer

    Solution

    The use of "had" in fragment (C) aligns with the past tense and ensures grammatical correctness and parallel structure, maintaining the proper sequence of events in the sentence.

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