In the following twenty questions, a sentence has been given in Active/Passive Voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive/Active Voice and mark your answer in t he Answer Sheet.
Ratan is performing an experiment.

Options

A. An experiment is performed by Ratan
B. An experiment was performed by Ratan.
C. An experimentis being performed by Ratan.
D. Experiments were performed by Ratan.

Answer

C