Question

Which best identifies a relative pronoun?

which

its

theirs

them

Answer 1

Relative pronouns connect a clause or phrase to a noun and/or pronoun. "which" is the only one that could connect a clause to a noun.

Answer 2

The answer to your question would be that the one that identifies best a relative pronoun is "which". Relative pronouns introduce relative clauses and they refer to nouns that have been previously mentioned. What is more, relative pronouns can function as a possessive pronoun, an object or the subject.