<prompt> Webbing of neck increased carrying angle, low posterior hairline and short fourth metacarpal are characteristics ofKlinefelter syndromeTurner syndromeCri du chat syndromeNoonan syndrome  <response>: Noonan syndrome presents with most features similar to Turners Syndrome. Webbing of the neck increased carrying angle, the low hairline is present in both Noonans and Turners Syndrome but short fourth metacarpal is characteristic of Turners syndrome only.Turners syndrome Defect in chromosomekaryotype is XOPhenotypic females only females sex onlyManifestationsShort StatureWebbed neck Low posterior hairlineCharacteristic faciesMicrognathiaEar abnormalitiesCubitus valgusBoard chest with widely spaced nipplesCardiac defect :Most commonly coarctation of the aorta and bicuspid aortic valveSensorineural hearing lossShort fourth metacarpalNo mental retardationLymphedema of hand feet 