a. 1 only ie
I. (n == 2) || (n == 3)
Explanation:
An integer is a number that can be written without a fractional component. For example, 21, 4, 0, and β2048 are integers, while 9.75, 5+, and β2 are not. The set of integers consists of zero, the positive natural numbers, also called whole numbers or counting numbers, and their additive inverses.
The answer is I. (n == 2) || (n == 3)