This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Subcapsular orchiectomy is done for \nSelect and explain. \nA. Ca testis, B. Ca prostate, C. Ca penis, D. Ca urethra', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Orchidectomy Orchidectomy is performed in advanced disease. In 1941, prostate cancer was shown to be responsive to such treatment by Charles Huggins, the only urologist to win a Nobel Prize. Bilateral orchidectomy, whether total or subcapsular, will eliminate the major source of testosterone production. Ref: Bailey and love 27th edition Pgno : 1474', 'role': 'assistant'}]