Mohini was often teased as corpulent by her friends.

The correct answer is D. fat.

Corpulent means fat or overweight. It is a neutral term that is not considered offensive.

Belligerent means aggressive or warlike. It is a negative term that is often used to describe someone who is angry or violent.

Gaunt means thin and bony. It is a neutral term that is often used to describe someone who is very thin or has been ill.

Garrulous means talkative or chatty. It is a neutral term that is often used to describe someone who talks a lot.

In the context of the question, Mohini was often teased as corpulent by her friends. This suggests that Mohini is overweight. The other options do not make sense in the context of the question.