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 one of the following is the most common extrauterine site to be affected by endometriosis: \nSelect and explain. \nA. Vagina, B. Rectovaginal septum, C. Sigmoid colon, D. Broad ligament (except tubes and ovaries)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Broad ligament (except tubes and ovaries)', 'role': 'assistant'}]