Question: Which of the following is a correct use of the idiom \'pulling someone\'s leg\'?

Options:

1. He was pulling my leg about the surprise party.
2. She is pulling her leg to get attention.
3. They pulled their legs during the race.
4. I pulled his leg to help him.

Correct Answer: He was pulling my leg about the surprise party.

Solution:

He was pulling my leg about the surprise party is the correct use of the idiom.