Which of the following is most soluble in water ?

• A

  $\mathrm{MnS}({\mathrm{K}}_{\mathrm{sp}}=8\times {10}^{-37})$

• B

  $\mathrm{ZnS} \left({\mathrm{K}}_{\mathrm{SP}} = 7 \times {10}^{-16}\right)$

• C

  ${\mathrm{Bi}}_2{\mathrm{S}}_3 \left({\mathrm{K}}_{\mathrm{SP}} = {10}^{-70}\right)$

• D

  ${\mathrm{Ag}}_2\mathrm{S} \left({\mathrm{K}}_{\mathrm{SP}} = 6 \times {10}^{-51}\right)$