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: Unknown
[{'content': 'Drug of choice for Choriocarcinoma is- \nSelect and explain. \nA. Nitrosourea, B. Gemcitabine, C. Methotrexate, D. Melphalan', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Methotrexate o Drug of choice for brain tumors - Nitrosoureas o Drug of choice for pancreatic Ca. - Gemcitabine o Drug of choice for choriocarcinoma - Methotrexate o Drug of choice for multiple myeloma - Melphalan", 'role': 'assistant'}]