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: Psychiatry
[{'content': 'In a child of Rett syndrome, all of the following are seen except: \nSelect and explain. \nA. Macrocephaly, B. Mental retardation, C. Abnormal dendritic connections, D. Seizures', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Macrocephaly Microcephaly, not the macrocephaly is seen in Rett syndrome.Rett SyndromeRett syndrome, originally termed as cerebroatrophic hyperammonemiaA neurodevelopmental disorder of the grey matter of the brainExclusively affects femalesCause:Caused by mutations in the gene MECP2 located on the X chromosomeClinical Features:Small hands and feetDeceleration of the rate of head growth (microcephaly)Repetitive stereotyped hand movements, such as wringing and/or repeatedlyUp to 80% have seizuresNo verbal skillsDelayed or absent ability to walkScoliosis, growth failure, and constipation are very common', 'role': 'assistant'}]