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
[{'content': 'Which of the following is feminizing ovarian tumours : \nSelect and explain. \nA. Granulosa cell tumour, B. Arrhenoblastoma, C. Hilus cell tumour, D. Gynandroblastoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Granulosa cell tumour', 'role': 'assistant'}]