Severe mental retardation is -
Ans is 'c' i.e. 20 - 35 o Normal IQ - 90-109;o Borderline IQ - 70-89;o Mild mental retardation IQ - 50-69;o Moderate mental retardation IQ -35-49;o Severe MR IQ - 20-34;o Profound MR IQ - 0-19.
50-70
35-50
20-35
<20
Intellectual disability, communication, autism, and ADHD