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': 'Features of dysgerminoma are: \nSelect and explain. \nA. Unilateral, B. Post-menopausal, C. Virilising, D. Cut section gritty', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]