Answer:
C.Electrons,protons.
Step-by-step explanation:
Cations:
When metal loos it electrons then it will form cations.
Ex:

Anion:
When metal gain electron then it will from anions.
Ex:

So from above we can say that ,the cations have fewer electrons than protons.Protons is also called as positive charged ions and electron are also called negatively charge ions.
SO the option is C is correct.