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': 'Anticancer drugs having highest emetogenic potential - \nSelect and explain. \nA. Cisplatin, B. Vincristine, C. Mthotrexate, D. Busulfan', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Cisplatin", 'role': 'assistant'}]