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: Gynaecology & Obstetrics
[{'content': 'Which of the following is the most common pure malignant germ cell tumor of the ovary ? \nSelect and explain. \nA. Choriocarcinoma, B. Gonadoblastoma, C. Dysgerminoma, D. Malignant teratoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e. Dysgerminoma Dysgerminoma is the most common malignant germ cell tumor of ovary.', 'role': 'assistant'}]