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
Sex chromosome pattern in Klinefelter's syndrome is: March 2004 
Select and explain. 
A. XXY, B. XO, C. XX, D. XY
A: XXY
Answer: A: XXY 
Explanation: Ans. A i.e. XXY