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': 'Endometriosis mostly occurs in ..... women : \nSelect and explain. \nA. Multiparous, B. Young, C. Post menopausal, D. Nulliparous', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nulliparous', 'role': 'assistant'}]