Aluminium is obtained from its ore using electrolysis. Which equation shows the reaction taking place at the anode during the electrolysis?
- A$\text{Al}^{3+} + 3e^- \rightarrow \text{Al}$
- B$\text{Al}^{3+} \rightarrow \text{Al} + 3e^-$
- C$2\text{O}^{2-} \rightarrow \text{O}_2 + 4e^-$
- D$2\text{O}^{2-} + 2e^- \rightarrow \text{O}_2$