It is noticed that \( \mathrm{Pb}^{2+} \) is more stable than \( \mathrm{Pb}^{4+} \) but \( \mathrm{Sn}^{2+} \) is less stable than \( \mathrm{Sn}^{4+} \). Observe the following reactions.
\( \mathrm{PbO}_2 + \mathrm{Pb} \rightarrow 2\mathrm{PbO} ; \ \Delta_r G^\circ (1) \)
\( \mathrm{SnO}_2 + \mathrm{Sn} \rightarrow 2\mathrm{SnO} ; \ \Delta_r G^\circ (2) \)
Identify the correct set from the following
