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': "Which of the following autistic spectrum disorder carries good prognosis? \nSelect and explain. \nA. Childhood autism, B. Rett's disease, C. Heller's syndrome, D. Asperger's syndrome", 'role': 'user'}, {'content': "Answer: D \nExplanation: Asperger's syndrome is characterized by impaired social interaction and stereotyped behavior but no intellectual disability and no language disturbances,hence carries good progrosis.", 'role': 'assistant'}]