Question

    Out of the given options, choose the one which is the

    correct passive voice of the sentence given below. Who did this work?
    A Who has done this work? Correct Answer Incorrect Answer
    B This work was done by who? Correct Answer Incorrect Answer
    C By whom was this work done? Correct Answer Incorrect Answer
    D This work was done by whom? Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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