This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social Science, Mental Health & Genetics, Subject name: Social & Preventive Medicine
IQ = 35-47; classified according to WHO is 
Select and explain. 
A. Mild mental retardation, B. Moderate mental retardation, C. Severe mental retardation, D. Profound mental retardation
B: Moderate mental retardation
Answer: B: Moderate mental retardation 
Explanation: (Moderate mental retardation) (502- Park 2(fh)WHO gave the following classification of mental retardationMild mental retardationIQ = 50-70Moderate mental retardationIQ = 35-49Severe mental retardationIQ = 20-34Profound mental retardationIQ = Under 20.