The equations for three reactions are shown below. 1 $2\text{O}^{2-} \rightarrow \text{O}_2 + 4\text{e}^-$ 2 $\text{C} + \text{O}_2 \rightarrow \text{CO}_2$ 3 $\text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3$ These reactions occur during the extraction of metals. Which row is the correct one?
- A1; 2; 3
- B1; 3; 2
- C2; 1; 3
- D2; 3; 1