Question

Which of the following pair is twin prime numbers ?

• A. $(2,4)$
• B. $(1,3)$
• C. $(3,5)$
• D. $(7,9)$

Answer 1

The correct option is C $(3,5)$

Twin primes are set of two prime numbers having difference of $2.$
$(2,4)\to 4$ is not a prime number.

$(1,3)\to 1$ is not a prime number.

​​​​​​​​​​​​​​$(3,5)\to$ they both are prime numbers with difference of $2.$

​​​​​​​​​​​​​​$(7,9)\to 9$ is not a prime number.