<prompt> All are pervasive developmental disorders except ___Asperger syndromeAutistic disorderChildhood disintegrative disorderAttention deficit hyperactivity disorder  <response>: 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 