This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic mental disorders, Subject name: Psychiatry
Patient with IQ of 60 has 
Select and explain. 
A. Severe MR, B. Profound MR, C. Moderate MR, D. Mild MR
D: Mild MR
Answer: D: Mild MR 
Explanation: Mental Retardation Level IQ Range 1. Mild 50-70* 2. Moderate 35-50* 3. Severe 20-35* 4. Profound <20* Reference: A Sho Textbook of Psychiatry by Niraj Ahuja page no.156.