Final answer:
Oxytocin is used to manage postpartum hemorrhage by inducing uterine contractions to control bleeding.
Step-by-step explanation:
Medications used to manage postpartum hemorrhage include oxytocin, which is a medication that can help induce uterine contractions to stop bleeding. The answer to the student's question is c) Oxytocin. This is because oxytocin is the hormone that is primarily responsible for contractions during labor, which can also be used therapeutically postpartum to ensure the uterus contracts properly and reduce bleeding. Diuretics, antibiotics, and antipyretics are not typically used for managing postpartum hemorrhage.