Medium
Which reaction from the following occurs at $2000 \ K$ in the blast furnace for the extraction of iron?
- A$CaO + SiO_2 \longrightarrow CaSiO_3$
- B$CaCO_3 \longrightarrow CaO + CO_2$
- C$Fe_2O_3 + 3CO \longrightarrow 2Fe + 3CO_2$
- D$2C + O_2 \longrightarrow 2CO$
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