Which equation shows the reduction of a compound present in hematite in the blast furnace?
- A$2\text{Al}_2\text{O}_3 \rightarrow 4\text{Al} + 3\text{O}_2$
- B$\text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3$
- C$2\text{FeO} + \text{CO} \rightarrow \text{Fe}_2\text{O}_3 + \text{C}$
- D$\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2$