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': 'Risk factor for Squamous cell tumor of urinary bladder \nSelect and explain. \nA. Schistosomiasis, B. Bladder diverticulum, C. Chronic cystitis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Schistosomiasis and chronic cystitis are risk factors for SCC Bladder.', 'role': 'assistant'}]