For the sentence below, determine how the word in italics is used. Is it a relative pronoun, a subordinating conjunction, or neither?

The man (whose) car I borrowed filled it with gasoline.

Whose - relative pronoun

Explanation:

In the sentence, the word whose is a relative pronoun, and it indicates possession. The man whose car I borrowed (The car that I borrowed belongs to the man / I borrowed the man's car.) We use whose to introduce a relative clause that indicates possession by people, animals and things. Another example is: The film is about a spy whose wife betrays him.

It's a relative pronoun which introduces a relative clause.