In the following question, 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.

After driving Dr. Bose to the hospital he dropped him at his guest house.

A

After being driven to the hospital Dr. Bose was dropped at his guest house.

B

After he had driven Dr. Bose to the hospital he had dropped him at his guest house.

C

After he was driving Dr. Bose to the hospital he was dropping him at his guest house.

D

Dr. Bose was being driven to the hospital first and then he was being dropped at his guest house.