This document provides examples and points to remember about interrogative pronouns. The interrogative pronouns who, what, and which are used to ask questions. Who and whom usually refer to people, while which can also refer to people but is more specific than what. However, which and what refer to things and animals. Who acts as the subject of a verb, while whom acts as the object of a verb or preposition. Examples are given showing the correct uses of who, what, and which in interrogative sentences.