<prompt> A 3 year old boy with normal developmental milestones with delayed speech and difficulty in communication and concentration. He is not making friends. Most probable diagnosis isAutismADHDMental retardationSpecific learning disability  <response>: Delayed speech, difficulty in communication and concentration in a 3 year old child suggests the diagnosis of autism.AutismAutism is a neurologic disroder characterized by -Qualitative impairment in social interactionQualitative impairment in communication.Restricted repetitive and streotyped patterns of behaviour, interests, and activities. 