Which sentence contains a relative pronoun?

Answer options with 4 options
1.
That is my dog running across the street.

2.
Carrots are a favorite food of rabbits.

3.
When I play video games, I know I should be reading a book.

4.
People who drink five glasses of water a day are watching out for their health.

1 answer

The sentence that contains a relative pronoun is:

  1. People who drink five glasses of water a day are watching out for their health.

The relative pronoun in this sentence is "who."