In the sentence, "He is the athlete who has won many competitions," the word "who" is a...? Mcqs

In the sentence, "He is the athlete who has won many competitions," the word "who" is a...?

(A) Relative pronoun

(B) Interrogative pronoun

(C) Demonstrative pronoun

(D) None of these

Source: This question is taken from the Excise And Taxation Inspector & Narcotics Control (Bs-16)