<prompt> A 3 years old boy with normal developmental milestones with delayed speech, has difficulty in communication and concentration. He is not making friends. Most probable diagnosis is:AutismADHDMental retardationSpecific learning disability  <response>: The given scenario where child is having delayed speech and difficulty in communication and concentration and is not making friends, suggests - Autistic spectrum disorder. Autistic disorder: qualitative impairment of social behaviour impairment of communication skills stereotypic restricted behaviour onset before 3 years. More common in boys 