<prompt> The following are characteristic of autism EXCEPT:Onset after 6 years of ageRepetitive behaviorDelayed language developmentSevere deficit in social interaction  <response>: Ans. a Onset after 6 years of age. Ref. OP Ghai Paediatrics 6th ed. 65AUTISM Onset occurs before 3 years of age. Diagnostic triad of features is:- Impaired social interaction- Impaired communication- Impaired imagination Language development is delayed. Rigid repetitive pattern of behavior is seen. 