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: Pathology
[{'content': 'Which is the most common testicular tumor in patients older than 60 years? \nSelect and explain. \nA. Seminoma, B. Leydig cell tumor, C. Teratoma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Testicular lymphoma is the most common testicular tumor in patients older than 60 years.', 'role': 'assistant'}]