Answer: Option 'a' and 'd' are correct.
Step-by-step explanation:
Since we have given that
A number = -13
We need to find the subset of real number in which -13 belongs:
-13 is a negative integer.
It can be written in [tex]\frac{p}{q}[/tex] form.
So, it can be considered as rational number too.
But natural and whole numbers does not contain negative terms.
Hence, Option 'a' and 'd' are correct.