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': 'Treatment of stage I bladder cancer is \nSelect and explain. \nA. Radical cystectomy, B. Endoscopic removal with intravesical chemotherapy, C. Chemotherapy, D. Radiotherapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Endoscopic removal with intravesical chemotherapy', 'role': 'assistant'}]