Which subsets of real numbers does 1/3 belong to?

rational numbers

irrational numbers

whole numbers, integers, rational numbers

whole numbers, natural numbers, and integers.

The first because it is only a rational number

I believe the correct answer from the choices listed above is the first option. The subset of real numbers that the number 1/3 belongs is to the rational numbers. These numbers is a number that can be written as a ratio. The numerator and the denominator of the fraction are both integers.