Exercise is beneficial . . . . . . . . health.

A. to

B. with

C. on

D. at

Answer: Option A

Solution(By Examveda Team)

The phrase 'beneficial to' answers 'beneficial to whom?' while 'beneficial for' answers 'beneficial for what?' You should use the preposition 'to' for people or animals and the preposition 'for' for objects, ideas, or reasons.