What are some examples of interrogative pronoun in sentences?

An interrogative pronoun often takes the place of a noun that is the answer to the question.

The interrogative pronouns are: who, whom, what, which, whose.

Example sentences:

Who was at the door? It was a girl scoutselling cookies.

To whom should I give my completed application?

What is the best cleaner for this stain? Try a grease removing cleaner.

Which do you prefer, the red or the black?

Whose truck is in the driveway? The painter's truck is in the driveway.