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
The most effective antiemetic for controlling cisplatin induced vomiting is: 
Select and explain. 
A. Prochlorperazine, B. Ondansetron, C. Metoclopramide, D. Aprepitant
B: Ondansetron
Answer: B: Ondansetron 
Explanation: (Ref: KDT 6/e p646) 5HT3 antagonists like ondansetron, granisetron and topisetron are the agents of choice for chemotherapy induced vomiting.