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
Most common inherited cause of Intellectual disability 
Select and explain. 
A. Down's syndrome, B. Fragile X syndrome, C. Huntington's chorea, D. Ataxia telangiectasia
B: Fragile X syndrome
Answer: B: Fragile X syndrome 
Explanation: Most common inherited caused of Intellectual disability is Fragile X syndrome.