Stability of ions of Ge, Sn and Pb will be in the order

• A

  ${\mathrm{Ge}}^{2+}<{\mathrm{Sn}}^{2+}<{\mathrm{Pb}}^{2+}$

• B

  ${\mathrm{Ge}}^{4+}>{\mathrm{Sn}}^{4+}>{\mathrm{Pb}}^{4+}$

• C

  ${\mathrm{Sn}}^{4+}>{\mathrm{Sn}}^{2+}$

• D

  All are correct