<prompt> IQ of 15 is which grade of mental retardation -MildModerateBorderlineProfound  <response>: Ans. is d i.e., ProfoundCategoryIQNormal intelligence 90Borderline intelligence70 - 89Mental retardationMild MR50 - 69Moderate MR35-49Severe MR20-34Profound MR0-19 