This question is incomplete. Here's the complete question.
One of the girls left _________ jacket in the cafeteria.
Choose the pronoun that agrees with the italicized antecedent in number and gender.
A) his
B) her
C) hers
D) their
Answer: B) her
Step-by-step explanation:
Pronouns are used to indicate possession. Possessive pronouns are used in place of a noun while possessive determiners are placed before a noun.
Possessive determiners:
his
her
Possessive pronouns:
his
hers
In this case, the italicized antecedent refers to a girl (one of the girls), and the sentence refers to a jacket she possesses, so the correct pronoun would be the possessive determiner 'her.'