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: Surgery
[{'content': '5-FU is the chemotherapeutic agent of choice for all except - \nSelect and explain. \nA. Ca Breast, B. Ca Stomach, C. Ca Pancreas, D. Ca Colon', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Ca pancreas", 'role': 'assistant'}]