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': "The chromosomal complement in persons with Klinefelter's syndrome is : \nSelect and explain. \nA. 45, XO, B. 47 XXX, C. 46 XY, D. 47 XXY", 'role': 'user'}, {'content': 'Answer: D \nExplanation: 47 XXY', 'role': 'assistant'}]