Whole numbers
A whole number is a number that is either positive or zero. Fractions are not included. Some examples of whole numbers are 2, 3, 0, 122, but not 2/3.
So let's take a look at all the given options :
⇒ 10/2 (it simplifies to 5, so it's a whole number)
⇒ 0/5 (it simplifies to 0, so it's also a whole number)
⇒ 6/3 (it simplifies to 2, which is a whole number)
⇒ 10/4 (it simplifies to 5/2, which is not a whole number)
Therrefore our answer is d) 10/4