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': 'Antifolate cancer drug are - \nSelect and explain. \nA. Methotrexate, B. Azathioprine, C. Cycl osporin, D. Vincristine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Methotrexate o Folate antagonists which are used as anticancer cancer drugs :- (i) Methotrexate; (ii) Premetrexate", 'role': 'assistant'}]