The solubility product of a sulphide $MS$ is $3 \times 10^{-25}$ and that of another sulphide $NS$ is $4 \times 10^{-40}$. In an ammoniacal solution,which of the following occurs?
- AOnly $NS$ gets precipitated
- BOnly $MS$ gets precipitated
- CNo sulphide precipitates
- DBoth sulphides precipitate
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