This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'All are germ cell tumors except - \nSelect and explain. \nA. Seminoma, B. Leydig cell tumor, C. Embrional carcinoma, D. Endoderma sinus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: I. Germ cell tumors A. Seminomatous tumors 1. Seminoma 2. Spermatocytic seminoma 3. Anaplastic seminoma B. Non-seminomatous tumors 1. Embryonal carcinoma 2. Yolk sac (endodermal sinus) tumor 3. Choriocarcinoma C. Teratoma Mature Immature Teratoma with malignant transformation D. Mixed germ cell tumors II. Sex cord-stromal tumors A. Leydig cell tumor B. Seoli cell tumor Ref: RAM DAS NAYAK EXAM PREPARATORY MANUAL FOR UNDERGRADUATES 2nd ed. pg no: 650', 'role': 'assistant'}]