In the following question, a sentence has been given in Active/Passive Voice. Out of the four alternatives suggested, select the one which best express the same sentence in Passive/Active Voice.
Rohit had written an essay on 'Pollution'.

Options

A. An essay on 'Pollution' was written by Rohit.
B. An essay on 'Pollution' had been written by Rohit.
C. An essay on 'Pollution' wrote Rohit.
D. An essay on 'Pollution' have been written by Rohit.

Answer

B