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: Unknown
All of the following are characteristics of Rett syndrome EXCEPT 
Select and explain. 
A. Autistic behavior, B. Microcephaly, C. Peculiar wringing motion of the hands, D. Autosomal recessive inheritance
D: Autosomal recessive inheritance
Answer: D: Autosomal recessive inheritance 
Explanation: The genetics of Rett syndrome has not yet been determined. Although it is thought to be a genetic syn-drome, no inheritance pattern and no enzymatic deficiency or other metabolic explanation has been established for Rett syndrome. The other characteristics (autistic behavior, microcephaly, peculiar wringing motion of the hand, dementia) are common in patients with this disorder.