This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aetiology (Carcinoma Ovary), Subject name: Gynaecology & Obstetrics
[{'content': 'Most common malignant germ cell ovarian tumor: \nSelect and explain. \nA. Yolk sac tumors, B. Dysgerminoma, C. Dermoid cyst, D. Brenners', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) DysgerminomaRef. Shaws 15th ed, /: 933Please refer to above explanation.YOLK SAC TUMORS* Yolk sac tumors account for 20% of all malignant ovarian germ cell tumors* Microscopically Schiller-Duval bodies are pathognomonic when present.', 'role': 'assistant'}]