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': 'Surgery for undescended testis is best performed before what age: \nSelect and explain. \nA. Just after bih, B. 6 months of age, C. 12 months of age, D. 24 months of age', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Undescended testis (cryptochidism) is usually operated after the age of 1 year. There is high chance of testis desend between age of 3-6 months on its own. So it better to do surgery after 1 year of age. Ref: Handbook of Pediatric Urology By Laurence S. Baskin, Barry A. Kogan, 2nd Edition, Page 26', 'role': 'assistant'}]