This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic Approach to Pediatric Medicine, Subject name: Pediatrics
[{'content': 'Kleinfilter syndrome is dignosed by - \nSelect and explain. \nA. Karvo typing, B. USG abdomen, C. Triple test, D. Echocadiography', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Karyo typing Klinefelter syndromeo Extra x chromosome (47 XXY) karyotypeo Small testes with hyalinised seminiferous tubuleso Delayed puberty# Delayed secondory sexual charactero Small peniso Tall & under weighto Mental retardationo Gynaecomastia", 'role': 'assistant'}]