Fill in the blank with the correct preposition.
He was vexed __________ Sonali for her behaviour.

with

The correct answer is OPTION 4 -- WITH

The correct preposition to fill in the blank is with. The preposition with can be used to indicate association or cooperation, or it can be used to indicate a source of annoyance or irritation. In this case, he was vexed with Sonali for her behavior, which means that he was annoyed or irritated by her behavior.

The other options are incorrect.

• At is used to indicate something that is being discussed or talked about.
• To is used to indicate direction or purpose.
• Upon is used to indicate something that is being discussed or talked about, or it can be used to indicate movement or placement above something.