A group of rational numbers is an example of __________ A. a

a-group-of-rational-numbers-is-an-example-of-a-a

A group of rational numbers is an example of __________

A. a subgroup of a group of integers

B. a subgroup of a group of real numbers

C. a subgroup of a group of irrational numbers

D. a subgroup of a group of complex numbers

I got this question in an interview.

My doubt stems from Groups topic in section Groups of Discrete Mathematics

Correct option is B. a subgroup of a group of real numbers

For explanation: If we consider the abelian group as a group rational numbers under binary operation + then it is an example of a subgroup of a group of real numbers.