This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
[{'content': 'Thimble bladder is seen in: \nSelect and explain. \nA. TB, B. BPH, C. Malignancy, D. Schistosomiasis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) TBRef: Campbell Urology 11th Edition, Page 423* Severely contracted thimble bladder occurs in tuberculosis; typically has a capacity of less than 20mL.', 'role': 'assistant'}]