This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
All are pervasive developmental disorders except _____________ 
Select and explain. 
A. Asperger syndrome, B. Autistic disorder, C. Childhood disintegrative disorder, D. Attention deficit hyperactivity disorder
D: Attention deficit hyperactivity disorder
Answer: D: Attention deficit hyperactivity disorder 
Explanation: Pervasive developmental disorders, also called as autistic spectrum disorders, a cluster of syndromes that share marked abnormalities in the development of social and communicative skills Autistic disorder Rett syndrome Asperger syndrome Childhood disintegrative disorder Attention deficit hyperactivity disorder (ADHD) does not come under autistic spectrum disorders. symptoms of both may overlap. Ref : Ghai 8edition pg:61