Question

Fill in the blank with a suitable modal:
You ________ go near that dog! It's very dangerous.

• A. May not
• B. Don't have to
• C. Mustn't
• D. Needn't

Answer 1

The correct option is C Mustn't

The correct answer is Option C.

MUSTN'T expresses the certainty and compulsion to not do something.

In the given sentence the speaker is warning the opposite person against going near the dog.

The remaining options are incorrect because:

MAY NOT expresses the probability of something not happening.

DON'T HAVE TO and NEEDN'T express the lack of obligation to do something.