Every rational number is
(a) a natural number (b) a whole number (c) an integer (d) a real number
(d) a real number
A rational number is any number which can be expressed as the quotient of two integers, i.e., ab, where a and b are both integers and b≠ 0.
5 is a natural number, a whole number and an integer which can be represented as 51 and so it is a rational number. But fractions are rational numbers but doesn't include in integers or whole numbers or natural numbers. They belong in real numbers.