$\text{MY}$ and ${\text{NY}}_3$, two nearly insoluble salts, have the same $K_{sp}$ values of $6.2\times 10^{-13}$ at room temperature. Which statement would be true in regard to $\text{MY}$ and ${\text{NY}}_3$?

1. A
   The molar solubility of $\text{MY}$ in water is less than that of ${\text{NY}}_3$.
2. B
   The salts $\text{MY}$ and ${\text{NY}}_3$ are more soluble in $0.5\text{M KY}$ than in pure water.
3. C
   The addition of the salt of $\text{KY}$ to solution of $\text{MY}$ and ${\text{NY}}_3$ will have no effect on their solubilities.
4. D
   The molar solubilities of $\text{MY}$ and ${\text{NY}}_3$ in water are identical.