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. Colloid cell type, C. Schirrhous type, D. Columnar cell type', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]