<prompt> True aboutAutism -a Persistent delusionb Persistent hallucinationc Incoordinate social interactiond Defective reciprocal interactione Onset after 5 yrabcdbdac  <response>: Autism i.e., marked impairment in reciprocal, social and interpersonal interaction... AhujaOnset of symptoms of autism is before 2.5-3 years.There are no delusions or hallucinations. 