${\mathrm{K}}_{\mathrm{sp}} \mathrm{of}$ a spraingly soluble salt, ${\mathrm{X}}_2{\mathrm{Y}}_3$ in terms of molar solubility(s) is equal to

• A

  $27 {\mathrm{S}}^4$

• B

  $108{\mathrm{S}}^5$

• C

  $216{\mathrm{S}}^6$

• D

  $1096{\mathrm{S}}^7$