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
[{'content': 'A child presents with antimongoloid slant, pulmonary stenosis, short stature and undescended testis. The likely diagnosis is – \nSelect and explain. \nA. Hypoparathyroidism, B. Noonan syndrome, C. Klinefelter syndrome, D. XYY sex chromosomes', 'role': 'user'}, {'content': "Answer: B \nExplanation: Noonan Syndrome : -\n\nAutosomal dominant\nMale or female with turner phenotype\nKaryotype is normal\nCongenital heart disease (Supravalvular pulmonary stenosis)\xa0\nAbnormalities of cardiac conduction and rhythum\nDownslanting palpebral fissure (Antimongoloid slant)\nPectus carinatum or Pectus excavatum\nHypertelorism\nCryptorchidism (small testes)\nSensorineural hearing loss\n\nCardiac abnormality in Noonan's Syndrome\n\nMost common → pulmonary stenosis (Supravalvular)\nHypertrophic cardiomyopathy\nAbnormalities of cardiac conduction and rhythum\nShort stature\nWebbed neck\nLow set ears\nCubitus valgus\nPtosis\nMicrognathia\nClinodactyly\nDelayed puberty\nASD\nCoarctation of Aorta (rare)", 'role': 'assistant'}]