Which equation shows a reaction taking place in a blast furnace during the extraction of iron from hematite?
- A$\text{Ca} + \text{CO}_2 \rightarrow \text{CaO} + \text{CO}$
- B$\text{Fe}_2\text{O}_3 + 3\text{Ca} \rightarrow 2\text{Fe} + 3\text{CaO}$
- C$\text{Ca(OH)}_2 \rightarrow \text{CaO} + \text{H}_2\text{O}$
- D$\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2$