A pronoun used to ask a question is called an interrogative pronoun. Who are you, for instance, uses the pronoun who as an interrogative. Interrogative pronouns take the place of nouns in sentences like most other pronouns do.
When we ask a question, we utilise interrogative pronouns. The interrogative pronoun denotes that which we are unsure of (what we are asking the question about). Keep in mind that the possessive pronoun whose can be used to ask a question (an interrogative possessive pronoun).
A question word, also known as an interrogative word, is a function word that is used to pose an inquiry. Examples include what, which, when, where, who, whom, whose, why, whether, and how. Because most of them in English begin with the letter wh, they are commonly referred to as "wh-words" (compare Five Ws).
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