<prompt> All the following are features of Down syndrome except:Brushfields spots in irisSimian creaseMental retardationHypertonia  <response>: d. HypertoniaRef: Nelsons 20e p 610-615, Ghai 8e p 637-639Hypotonia is a feature of Down syndrome and not hypertoniaImportant clinical features of Down SyndromeI C a PROBLEM SomewhereIncurved 5th finger clinodactylyQIntellectual disabilityCongenital heart diseaseQAcute LeukemiaAlzheimers diseaseQAtlantoaxial instabilityQProtruding tongueRound faceOcciput flatOpen, wide fontanelleQBrushfield spots in irisQBrachycephalyLow depressed nasal bridgeEpicanthic foldQEars low-set dysplasticMonogoloid slantQMental retardationSandle gapQSimian palmar creaseQ 