Question

What is interrogative pronoun

Answer 1

It refers to a pronoun that introduce a question. ( who, whom, whose, which and what) function as interrogative pronouns
"Who are you?'
"I don't know,' she said."

Answer 2

An interrogative pronoun is a questioning pronoun, used when asking. For instance the five Ws - who, what, where, when, why. In this sentence - How could that be you moron? - the interrogative pronoun is 'How'.