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 Kleinfilters syndrome is: \nSelect and explain. \nA. 47XXY, B. 45X0, C. 46XXY, D. 45XXX', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 47XXY', 'role': 'assistant'}]