Which type of pronoun is bolded in the following sentence? what car did francis buy? indefinite pronoun demonstrative pronoun relative pronoun interrogative pronoun

What car did Francis buy?

Interrogative pronoun was used here.
We use an interrogative pronoun to ask a particular question. 

There are only five such pronouns:
- What
- Which
- Who
- Whom
- Whose

They can also take on the suffix - ever - e.g. Whoever

Hope it helps :)

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