This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
[{'content': 'The most effective antiemetic for controlling cisplatin induced vomiting is: \nSelect and explain. \nA. Prochlorperazine, B. Ondansetron, C. Metoclopramide, D. Aprepitant', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: KDT 6/e p646) 5HT3 antagonists like ondansetron, granisetron and topisetron are the agents of choice for chemotherapy induced vomiting.', 'role': 'assistant'}]