This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following are the markers for malignant germ cell tumors of ovary except: \nSelect and explain. \nA. CA-125, B. Alpha fetoprotein, C. HCG, D. LDH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - most germ cell tumors secrete some tumor marker. - endodermal sinus tumors secrete alpha fetoprotein. - human chorionic gonadotrophin is secreted by choriocarcinoma. - tumors markers like placental alkaline phosphatase and lactic dehydrogenase may be elevated in dysgerminoma. - CA-125 is tumor marker in epithelial ovarian cancer. Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no: 282 <\\p>', 'role': 'assistant'}]