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 (A)/ not only advanced our understanding (B)/ of quantum physics but also have been (C)/ practical applications in various industries. (D)Solution
“Had” will come in place of “have been”. This usage suggests that the practical applications occurred in the past relative to the advancement of understanding in quantum physics.
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