Find out whether there is any grammatical error in below sentence.
Unless you stop to make noise at once / I will have no option but to / bring the matter to the attention of the police.

A. Unless you stop to make noise at once

B. I will have no option but to

C. bring the matter to the attention of the police.

D. No error

Answer: Option A

Solution(By Examveda Team)

'Unless you stop making noise at once'