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': 'Following tumorurs have the best prognosis ? \nSelect and explain. \nA. Following tumorurs have the best prognosis ?, B. Carcinoma pancreas, C. Heptatoma, D. Cholangiocarcinoma of the CBD', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e. Heptatoma", 'role': 'assistant'}]