This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'The following are characteristic of autism EXCEPT: \nSelect and explain. \nA. Onset after 6 years of age, B. Repetitive behavior, C. Delayed language development, D. Severe deficit in social interaction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a (Onset after 6 years of age). (Ref. OP Ghai Paediatrics 6th ed. 65)AUTISM# Onset occurs before 3 years of age.# Diagnostic triad of features is:- Impaired social interaction- Impaired communication- Impaired imagination# Language development is delayed.# Rigid repetitive pattern of behavior is seen.', 'role': 'assistant'}]