At the temperature corresponding to which of the points in figure, Feo will be reduced to Fe by coupling the reaction, 2FeO⟶2Fe+O2 with all of the following reactions? 1.C+O2⟶CO22.2C+O2⟶2CO3. 2CO+O2⟶2CO2

Below point B and E, FeO will be reduced to Fe by all the three reactions shown above in the question. ΔGC,CO2∘,ΔG(C,CO)∘,ΔGCO,CO2∘ lie below ΔfG∘(Fe,FeO) curve at point B and E. Therefore, FeO will be reduced by all three reactions. Hence, options (b) and (d) are correct choice.