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': 'Disseminated seminoma is treated by \nSelect and explain. \nA. CT or RT and orchidectomy, B. Only RT, C. Only CT, D. Retroperitoneal lymphnode dissection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]