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': 'Which is the best time to do orchidopexy for undescended testis \nSelect and explain. \nA. 4 months, B. 6 months, C. 1 year, D. 2 year', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ideal time to do orchidopexy is 6 months of age', 'role': 'assistant'}]