<prompt> IQ level in profound mental retardation is -20-2525-4040-5555-70  <response>: Ans. is a i.e., 20-25 o I.Q. level is used to assess level in intelligenceo Degree of intellectual impairment is divided on basis of I.Q. level.Mild MR 55-70Moderate MR 40-55Severe MR 25-40Profound MR 20 - 25 