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: Psychiatry
Mental retardation is defined if IQ is below ? 
Select and explain. 
A. 90, B. 80, C. 70, D. 60
C: 70
Answer: C: 70 
Explanation: Ans. is `c' i.e., 70 o A child with IQ . 70 is called mentally retarded.