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: Medicine
[{'content': 'Radical retroperitoneal lymphnode dissection is indicated for all the following testicular tumours except - \nSelect and explain. \nA. Choriocarcinoma, B. Teratoma, C. Teratocarcinoma, D. Seminoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]