Which sentence contains the interrogative pronoun? a. isabel herself wishes to the members of the academy. b. what did you say when you found out that you had won? c. there are the glasses i’ve been looking for. d. the house, which the family had owned for years, had to be sold.

The correct answer is B) what did you say when you found out that you had won?

The sentence that contains the interrogative pronoun is "what did you say when you found out that you had won?"

An interrogative pronoun is used when we need to ask questions. If we have doubts and want to know something we used interrogative pronouns to know the answer. The interrogative pronouns are "who, what, whom, which." For example: What is under the table? Who is your friend? Whom do you prefer to listen to? or Which one is yours?