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': 'Karyotype in Klinefelter’s syndrome is? \nSelect and explain. \nA. 45 XXX, B. 45XO, C. 46XXY, D. 47 XXY', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]