This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'A 3 year old child with normal developmental milestones except delayed language development (poor speech development). He has difficulty in concentration, communication, and making friends (i.e. he has no friends) and spends time seeing his own hands. The most probable diagnosis is: \nSelect and explain. \nA. Autism, B. ADHD, C. Specific learning disability, D. Mental retardation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Autism', 'role': 'assistant'}]