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': 'Webbing of neck increased carrying angle, low posterior hairline and short fourth metacarpal are characteristics of – \nSelect and explain. \nA. Klinefelter syndrome, B. Turner syndrome, C. Cri du chat syndrome, D. Noonan syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Noonan syndrome presents with most features similar to Turner's Syndrome. Webbing of the neck increased carrying angle, the low hairline is present in both Noonan's and Turner's Syndrome but short fourth metacarpal is characteristic of Turner's syndrome only.\nTurner's syndrome \n\nDefect in chromosome\nkaryotype is XO\nPhenotypic females only (females sex only)\n\nManifestations\n\nShort Stature\nWebbed neck\xa0 \xa0 \xa0\nLow posterior hairline\nCharacteristic facies\nMicrognathia\nEar abnormalities\nCubitus valgus\nBoard chest with widely spaced nipples\n\nCardiac defect :\n\nMost commonly coarctation of the aorta and bicuspid aortic valve\nSensorineural hearing loss\nShort fourth metacarpal\nNo mental retardation\nLymphedema of hand & feet", 'role': 'assistant'}]