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': 'Indications of surgery in Varicocele is/are: \nSelect and explain. \nA. Small testis, B. Pain, C. Oligospermia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans is a (Small testis), b (Pain), c (Oligospermia)', 'role': 'assistant'}]