This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathology (Carcinoma Ovary), Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is the most common malignant germ cell tumor of ovary? \nSelect and explain. \nA. Yolk sac tumor, B. Dysgerminoma, C. Polyembryoma, D. Choriocarcinoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Dysgerminoma Dvsgerminomao It is the most common malignant germ cell tumor of ovary,o It affects young women and is usually unilateral.o Bilateral tumors are seen in 15 - 20% of the cases.o It is fleshy in consistency.o Histologically it shows presence of lymphocytic infiltration which is considered a good prognostic sign.", 'role': 'assistant'}]