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: Pediatrics
[{'content': 'True about autism - \nSelect and explain. \nA. Occurs in high economic striata, B. Normal communication, C. Stas before 2-3 years of age, D. More common in girls', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Stas before 2-3 years of age Autism o Autism is a neurologic disroder characterized by ? Qualitative impairment in social interaction Qualitative impairment in communication. Restricted repetitive and streotyped patterns of behaviour, interests, and activities. Onset of symptoms is usually before 3 years of age. 3-5 times more common in boys, but more severe when occurs in girls. o More common among low socio-economic groups. Clinical features Impairment in communication Impairment in social interaction Inability to concentrate Restricted repetitive and streotypes patterns of behaviour, interests and activities. Failure to acquire speech. Approximately 75% of children with autism are mentally retarded. Epilepsy develops in approximately one-fifth to one-third individuals. Half of autistic patients have abnormalties on EEG.", 'role': 'assistant'}]