So,
Let's find the balanced, ionic equation for the reaction:
The first thing we need to check is that the reaction is balanced. This means that the number of atoms of each element before and after the reaction occurs must be the same. If we count, we find out that this reaction is actually balanced.
Now, we're going to split strong electrolytes into ions. (Which is the complete ionic equation) Remember that the solid compounds can not be splitted into ions.
So, the correct answer for this question is option C.