What is d difference b/w relative pronoun and indefinite pronoun ?

Relative pronouns are pronouns in the subordinate clause. They have an antecedent in the main claue. They are used to connect a clause or phrase to a noun or a pronoun.

For example: This is the actor that everyone is talking about.

An indefinite relative pronoun is one without an antecedent.

For example: The priest gave flowers to whoever wanted them.

Indefinite pronouns refer to unspecified antecedents.

For example: Anyone can learn English.