Using the Gibbs change, $\Delta G^o = + 63.3 \;kJ$, for the following reaction, $Ag_2CO_3 (g) \leftrightharpoons 2 Ag^+ (aq) + CO^{2-}_3 (aq)$ the $K_{sp}$ of $Ag_2CO_3 (s)$ in water at $25^oC$ is ($R = 8.314 \; JK^{-1} mol^{-1}$)

Question

( A ) $8.0 \times 10^{-12}$
( B ) $2.9 \times 10^{-3}$
( C ) $7.9 \times 10^{-2}$
( D ) $3.2 \times 10^{-25}$