The correct option is B 1 is neither prime nor composite.
A prime number is a whole number with exactly two factors, 1 and the number itself.
For example, 2,3,5,7, and 11 are prime numbers.
Composite numbers, on the other hand, have more than two factors.
For example, 4,6,8,9, and 10 are composite numbers.
1 does not fit in either of the two conditions. Hence, 1 is neither prime nor composite.