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
Karyotype in Kleinfilters syndrome is: 
Select and explain. 
A. 47XXY, B. 45X0, C. 46XXY, D. 45XXX
A: 47XXY
Answer: A: 47XXY 
Explanation: 47XXY