This question was previously asked in

HSSC Police Constable 7 Aug 2021 Shift 1 (canceled) Official Paper

Option 3 : 36 - 83

Except for 36 - 83, in each option, here are two numbers and both the numbers are perfect squares in such a way that if the first number is the perfect square of X then the other number is the perfect square of X + 3.

In 121 - 196,

121 - 196 ⇒ \(11^2 - 14^2\)

In 144 - 225,

144 - 225 ⇒ \(12^2 - 15^2\)

In 16 - 49,

16 - 49 ⇒ \(4^2 - 7^2\)

In 36 - 83, the second number i.e. 83, is not a perfect square.

Hence, **"36 - 83"** is different from the other three.