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': "Most common inherited cause of Intellectual disability \nSelect and explain. \nA. Down's syndrome, B. Fragile X syndrome, C. Huntington's chorea, D. Ataxia telangiectasia", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common inherited caused of Intellectual disability is Fragile X syndrome.', 'role': 'assistant'}]