Arrange the following descriptive levels of IQ in their increasing order of percentage in the population:
A. Superior
B. Intellectually disabled
C. Average
D. High average
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → B, A, D, C
(B) Intellectually disabled — IQ below 70: 2.2 per cent of the population, the smallest share of the four.
(A) Superior — IQ 120-130: 6.7 per cent.
(D) High average — IQ 110-119: 16.1 per cent.
(C) Average — IQ 90-109: 50.0 per cent, the largest share, since most people fall in the middle of the normal curve.
NCERT: Psychology — Chapter 1: Variations in Psychological Attributes, Table 1.1 (2025-26)
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