The solubility of sparingly soluble salts $MX$, $MX_2$ and $MX_3$ is $1 \times 10^{-3} \text{ mol/L}$. Hence, their respective solubility products are

• A
  $1 \times 10^{-6}, 4 \times 10^{-9}$ and $27 \times 10^{-12}$
• B
  $1 \times 10^{-9}, 4 \times 10^{-9}$ and $32 \times 10^{-12}$
• C
  $1 \times 10^{-9}, 8 \times 10^{-8}$ and $32 \times 10^{-12}$
• D
  $1 \times 10^{-6}, 8 \times 10^{-8}$ and $27 \times 10^{-12}$