Question

Select the option which contains a set of prime numbers.

• A. 1, 2, 3, 5, 7
• B. 2, 5, 9, 11, 17
• C. 19, 13, 11, 7, 3
• D. 23, 29, 39, 37, 43

Answer 1

The correct option is C

19, 13, 11, 7, 3

A natural number that is divisible only by 1 and itself is called a prime number.

1 is not a prime number, as it has only one factor which is 1 and itself.

2 is the only even prime number.

19, 13, 11, 7, 3 are prime numbers since they are divisible only by 1 and themselves.

Considering all the factors, 'C' is the right option.