In which of the following pair of metals, both are commercially extracted from their respective ores by self-reduction method?

SnO2+C→SnO+CO          ZnO+C→coke. 673Zn+CO          PbS+2O2→PbSO4;PbS+3O2→2PbO+2SO2PbS+2PbO→3Pb+SO2;PbS+PbSO4→2Pb+2SO2          2CuFeS2+4O2→Cu2S+2FeO+3SO2          Cu2S+FeO+SiO2→FeSiO3(fusible slag)+Cu2S(matte)         2Cu2S+3O2→2Cu2O+2SO2;2Cu2O+Cu2S→6Cu+SO2          Cathode: Al3+(melt)+3e−→Al(l)          Anode: C(s)+O2−(melt)→CO(g)+2e−          C(s)+2O2−(melt)→CO2(g)+4e−          4Au/Ag(s)+8CN−(aq)+2H2O(aq)+O2(g)→4[Au/Ag(CN)2]−(aq)+4OH−(aq)          2[Au/Ag(CN)2]−(aq)+Zn(s)→2Au/Ag(s)+[Zn(CN)4]2−(aq)