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: Pediatrics
Klinefelter syndrome is diagnosed by – 
Select and explain. 
A. Karyotyping, B. USG abdomen, C. Triple test, D. Echocardiography
A: Karyotyping
Answer: A: Karyotyping 
Explanation: None