This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'The most preferred acute emetic for emesis induced by anticancer drugs is \nSelect and explain. \nA. Ondensetron, B. Metaclopromide, C. Chlorpromazine, D. Dicyclomine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]