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: Medicine
Which of the following is an example of disorders of sex chromosomes ? 
Select and explain. 
A. Marfan's syndrome, B. Testicular feminization syndrome, C. Klinefelter's syndrome, D. Down's syndrome
C: Klinefelter's syndrome
Answer: C: Klinefelter's syndrome 
Explanation: None