CTET 2 Math and Science Dec 2019 Paper

Concept:
If $\mathrm{x}$ and $\mathrm{y}$ are twin primes then both $\mathrm{x}$ and $\mathrm{y}$ must be individually prime and they should differ by 2
Calculation:
Twin Prime between 1 and 100
3,5
5,7
11,13
17, 19
29,31
41, 43
59,61
71,73
$\therefore$ There are eight pairs of twin prime between 1 and 100 .