Question

An example of twin primes is

• A. $11,13$
• B. $13,15$
• C. $28,29$
• D. $31,33$

Answer 1

The correct option is A

$11,13$

Pairs of prime numbers having a difference of $2$ are called Twin primes.

In option(A), $11,13$ are prime numbers and their difference is $2$.So, these are called twin primes. Option is correct

In option(B),$13,15$ here $13$ is a prime number but $15$ is not a prime number. So, it is incorrect.

In option(C),$28,29$ here $28$ is not a prime number. So, it is incorrect.

In option(D),$31,33$ here $31$is a prime number but $33$is not a prime number. So, it is incorrect.