This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Autism is \nSelect and explain. \nA. Neurodevelopmental disorder, B. Social and language communication problem, C. Metabolic disease, D. Mainly due to hypothalamus damage', 'role': 'user'}, {'content': "Answer: B \nExplanation: (B) Social & language communication problem# Autism (i.e. marked impairment in reciprocal social and interpersonal interaction): Absent social smile, Lack of eye-to-eyecontact, Lack of awareness of others' existence or feelings; treats people as furniture, Lack of attachment to parents and absence of separation anxiety, No or abnormal social play; prefers solitary games, Marked impairment in making friends, Lack of imitative behavior, Absence of fear in presence of danger.", 'role': 'assistant'}]