He is responsible . . . . . . . . the president for his decisions?

A. for

B. of

C. to

D. with

Answer: Option C

Solution(By Examveda Team)

The adjective 'responsible' can be followed by the prepositions 'for' or 'to'.
Use 'for' when you are naming a task that a person or group has to carry out.
Use 'to' when you are naming the person or group of people to whom you have a duty.