The solubility of $\mathrm{Mg}(\mathrm{OH})_2$ is $\mathrm{S}$ moles/litre. The solubility product under the same condition is

• Correct answer
  A

  $4 \mathrm{~S}^3$
• B

  $3 S^4$
• C

  $4 \mathrm{~S}^2$
• D

  $S^3$

Hence, the correct answer is option: 'A'.