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': 'A 62 year old patient presents with hematuria. On investigations he is\nfound to have renal calculi, calcifications in the wall of urinary bladder and\nsmall contracted bladder. most likely cause is \nSelect and explain. \nA. Bladder diverticulitis, B. Schistosomiasis, C. Prostate calculi, D. Ca. bladder', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Schistosomiasis will cause calcification and increases risk for ca. Bladder\n(SCC > TCC).', 'role': 'assistant'}]