Thomas Edison, whose accomplishments are legendary, will be our focus next week.

Which is the relative pronoun, and what is its function in the sentence?

Relative pronoun is our; it functions as part of the adverb clause.

Relative pronoun is our; it functions as part of the adjective clause.

Relative pronoun is whose; it functions as part of the adverb clause.

Relative pronoun is whose; it functions as part of the adjective clause.