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': 'Subcapsular orchiectomy is done for cancer of - \nSelect and explain. \nA. Testes, B. Prostate, C. Penis, D. Urethra', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bilateral orchidectomy, whether total or subcapsular, will eliminate the major source of testosterone production in patients of carcinoma prostate.\n• Orchidectomy is performed to carry out androgen ablation in the treatment of locally advanced (T3 or T4) disease or of metastatic disease.\n• In 1941, prostate cancer was shown to be responsive to such treatment by Charles Huggins, the only urologist to win a Nobel Prize.\n• Bilateral orchidectomy, whether total or subcapsular, will eliminate the major source of testosterone production.', 'role': 'assistant'}]