What type of pronoun is which

This is an interrogative pronoun.

Explanation:

Interrogative pronouns are used in questions. Although they are classified as pronouns, it is not easy to see how they replace nouns. Who, which, what, where, and how are all interrogative pronouns.

interrigative pronoun

Explanation:

e. g. which, who

an interrogative pronoun is a pronoun which is used to make asking questions easy there are 5 interrogative pronouns