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
Which of the following is the most common pure. malignant germ cell tumor of the ovary? 
Select and explain. 
A. Choriocarcinoma, B. Gonadoblastoma, C. Dysgerminoma, D. Malignant teratoma
C: Dysgerminoma
Answer: C: Dysgerminoma 
Explanation: None