Answer: Imaginary number is the correct answer
Explanation:
Since we know that
Real numbers is the set of all rational numbers and irrational numbers.
So, Real numbers would contain rational numbers and irrational numbers obviously as well as it would contain even number.
But imaginary numbers are part of complex number.
So, Real number would never contain imaginary numbers.
Thus, it is not a subset of real number.
Hence, Imaginary number is the correct answer.