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': 'Most common bladder tumor is \nSelect and explain. \nA. TCC, B. SCC, C. Adenocarcinoma, D. STS', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TCC is most common cancer of bladder.', 'role': 'assistant'}]