This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood tumors, Subject name: Pediatrics
[{'content': 'Germ cell tumor(s) of paediatric includes all except \nSelect and explain. \nA. Pure yolk sac tumor, B. Leydig cell tumor, C. Choriocarcinoma, D. Embryonal cell carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Germ cell tumors in males(95%) include embryonal carcinoma(40%),yolk sac tumor(5%),Choriocarcinoma(rare),Seminoma(45%) and teratomas.Leydig cell tumor is a sex cord-stromal tumor(5%).Other sex cord -stromal tumors in males are seoli cell tumor,granulosa cell tumor. In females,germ cell tumors(15-20%) include embryonal carcinoma(40%),yolk sac tumor,choriocarcinoma(rare), teratomas(95%) ,dysgerminoma(2%).Sex cord-stromal tumors (5-10%) include granulosa-theca cell tumor,seoli-leydig cell tumor,gynandroblastoma. Reference:Textbook of pathology-Harsh Mohan,6th edition,page no:708,745.', 'role': 'assistant'}]