Match the pairs of people in List-I with the usual correlation betwee…

Match the pairs of people in List-I with the usual correlation between their intelligence scores in List-II.

List-I	List-II
(A) Identical twins Sita and Gita, separated in infancy and brought up by different families in different cities	(I) About 0.60
(B) Fraternal twins Aman and Arjun, brought up together in the same home	(II) About 0.25
(C) A brother and sister, Rohit and Neha, growing up together in one family	(III) About 0.72
(D) Two sisters, separated as babies and raised apart in different towns	(IV) About 0.50

Choose the correct answer from the options given below:

Answer & explanation

Correct answer: option 4

The correct answer is Option (4) → A-III, B-I, C-IV, D-II

List-I	List-II	Reason
(A) Identical twins Sita and Gita, separated in infancy and brought up by different families in different cities	(III) About 0.72	Identical twins have the same heredity. Even when brought up in different environments their scores correlate 0.72, which shows a strong hereditary influence.
(B) Fraternal twins Aman and Arjun, brought up together in the same home	(I) About 0.60	Fraternal twins are less alike in heredity than identical twins, though they share one home. Their scores correlate almost 0.60.
(C) A brother and sister, Rohit and Neha, growing up together in one family	(IV) About 0.50	Ordinary brothers and sisters reared together share part of their heredity and the same home. Their scores correlate about 0.50.
(D) Two sisters, separated as babies and raised apart in different towns	(II) About 0.25	Siblings reared apart lose the shared home as well. Their correlation drops to about 0.25, the lowest of the four.

Note: Identical twins reared apart (0.72) still correlate higher than fraternal twins reared together (0.60), which points to the weight of heredity.

NCERT (2026-27): “Intelligence: Interplay of Nature and Nurture
The evidence for hereditary influences on intelligence comes mainly from studies on twins and adopted children. The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25. …”