This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Child psychiatry, Subject name: Psychiatry
In Profound MR, IQ is 
Select and explain. 
A. 50-69, B. 35-49, C. 20-34, D. < 20
D: < 20
Answer: D: < 20 
Explanation: IQ range for categoriesICD-10DSM-IVMild50-6950-55 to 70Moderate35-4935-40 to 50-55Severe20-3420-25 to 35-40ProfoundBelow 20Below 20-25Reference: Oxford Textbook of Psychiatry; 3rd edition; Chapter 18; Learning Disability