Find the number of protons and neutrons of that element and add them together. You might need periodic table. Hope it helps.
Answer: The net ionic equation will be as follows.

Explanation:
The chemical equation for the given reaction is as follows.

We know that a strong acid or base will dissociate completely into a solvent whereas a weak acid or base dissociates partially into the solvent. Hence, the ionic equation will be as follows.
Now, we will cancel the spectator ions from the above equation. Therefore, the net ionic equation will be as follows.

or,
It has to be A or B bc c and d are just dumb answers