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': 'All are germ cell tumors except ? \nSelect and explain. \nA. Seminoma, B. Leydig cell tumor, C. Embryonal carcinoma, D. Endodermal sinus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Leydig cell tumor", 'role': 'assistant'}]