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
Kleiner syndrome is diagnosed by 
Select and explain. 
A. Karvo typing, B. USG abdomen, C. Triple test, D. Echocadiography
A: Karvo typing
Answer: A: Karvo typing 
Explanation: Klinefelter syndrome

Extra x chromosome (47 XXY) karyotype
Small testes with hyalinised seminiferous tubules
Delayed puberty
Delayed secondary sexual characters Small penis
Tall & underweight
Mental retardation
Gynaecomastia