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 the following ovarian neoplasm secrete hormone, except \nSelect and explain. \nA. Granulosa cell tumor, B. Dysgerminoma, C. Hilus cell tumor, D. Theca cell tumor', 'role': 'user'}, {'content': "Answer: B \nExplanation: Granulosa cell tumors and the a cell tumors secrete progesterone resulting in secretory hyperophy Hilus cell tumor is a virilizing tumor secreting male sex hormones Dysgerminoma is a germ cell tumor, don't secrete hormones Ref: Shaw Gynecology 17 e pg 448,444.", 'role': 'assistant'}]