IQ = 20-34 -
WHO classification of mental retardation (MR) mild MR ...IQ 50-70 moderate MR....IQ 35-49 severe MR....IQ 20-34 profound MR... IQ undere 20 ref; (page no;582) 23rd edition of PARK&;s textbook of Preventive and Social medicine
Severe MR
Profound MR
Moderate MR
Mild MR
Social science, Mental health & Genetics