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: Pathology
[{'content': 'Klinefelter syndrome is: MP 07, 10; Maharashtra 09; Gujarat 10; AFMC 12 \nSelect and explain. \nA. 45XO, B. 46XY, C. 45XY, D. 47XXY', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. 47XXY', 'role': 'assistant'}]