Select the correct passive form of the given sentence.
You have made a mistake in writing your answer

Options

A. A mistake has been made by you in writing your answer
B. A mistake have been made by you in writing your answer
C. A mistake is being made by you in writing your answer
D. A mistake had been made by you in writing your answer.

Explanation

(a) A mistake has been made by you in writing your answer. (Correct) (b) A mistake have been made by you in writing your answer. (Helping verb have is incorret) (c) A mistake is being made by you in writing your answer. (Tense has changed) (d) A mistake had been made by you in writing your answer. (Tense has changed)