Option A is the correct answer. i.e. -6, -√225, 4 7/8.
What is Rational number?
A rational number is a number that is of the form p/q where p and q are integers and q is not equal to 0.
Here, out of these options
only option A have all the rational terms otherwise
in option B - 3.054..... is rational number.
in option C: π is a irrational number.
In option D: √21 is a irrational number.
Thus, Option A is the correct answer. i.e. -6, -√225, 4 7/8.
Learn more about Rational number from:;
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