Solubility of calcium phosphate (molecular mass, M) in water is W g per 100 mL at ${25}^0\mathrm{C}.$ Its solubility product at ${25}^0\mathrm{C}$ will be approximately

• A

  ${10}^9 {\left(\frac{\mathrm{W}}{\mathrm{M}}\right)}^5$

• B

  ${10}^7 {\left(\frac{\mathrm{W}}{\mathrm{M}}\right)}^5$

• C

  ${10}^5 {\left(\frac{\mathrm{W}}{\mathrm{M}}\right)}^5$

• D

  ${10}^3 {\left(\frac{\mathrm{W}}{\mathrm{M}}\right)}^5$