What type of pronoun is which?

Answer 1

The word 'which' is an interrogativepronoun, a word that introduces a question, a word that takes the place of the answer to the question.

For example:

Which shoes do you like the best? The blue shoes are my favorite.

The word 'which' is a relativepronoun, a word that introduces a relative clause that gives additional information about the antecedent.

For example:

This dress, which I bought yesterday, has a rip in the seam.