Answer:
D
Step-by-step explanation:
Firstly let's see definition of Rational numbers ,
Rational numbers :-
- The number in the form of p/ q where p and q are integers and q is not equal to zero is called a Rational number .
From the options , look at option D ,its
→ √400
→ √{20²}
→ 20
Hence option D is correct.
