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
The chromosomal complement in persons with Klinefelter's syndrome is : 
Select and explain. 
A. 45, XO, B. 47 XXX, C. 46 XY, D. 47 XXY
D: 47 XXY
Answer: D: 47 XXY 
Explanation: 47 XXY