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': 'Cholangiocarcinoma histologically resembles ? \nSelect and explain. \nA. Sq. cell type, B. Schirrhous type, C. Columnar cell type, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Schirrhous type", 'role': 'assistant'}]