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': 'Sex cord stromal tumours of the ovary include all except: \nSelect and explain. \nA. Luteomas, B. Gynandroblastomas, C. Seoli-Leydig cell tumours of the ovary, D. Theca-fibroma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sex cord stromal tumors of ovary- classification 1.granulosa stromal cell tumors cell tumor 2. Androblastoma cell tumor - Leydig cell tumor cell tumor cell tumor 3. Gynandroblastoma 4. Unclassified Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no:280 <\\p>', 'role': 'assistant'}]