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
Surgery for undescended testes is ideally performed before what age? 
Select and explain. 
A. 6 months, B. 12 months, C. 24 months, D. 36 months
B: 12 months
Answer: B: 12 months 
Explanation: Surgical correction of undescended testis should be done at 6 months and maximum by 1 year. Ref: Nursing care of the pediatric surgical patient By Nancy Tkacz Browne, Page 147-8; CPDT 20th Edition, Page 974.