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': 'Best treatment modality for SCC of bladder \nSelect and explain. \nA. Chemotherapy, B. Radiotherapy, C. Radical cystectomy, D. TURBT', 'role': 'user'}, {'content': 'Answer: C \nExplanation: SCC of bladder is treated by radical cystectomy.', 'role': 'assistant'}]