The girl ___ mother is a famous teacher has won the competition.
-
who's
-
who has
-
whose
-
which
C
Correct answer
Explanation
This sentence requires a possessive relative pronoun to show ownership. "Whose" is the only option that indicates possession: "the girl whose mother" means "the mother of whom." "Who's" is a contraction of "who is," "who has" would need to be followed by a verb phrase, and "which" is used for things, not people.