The two half-equations are given below. $\text{MnO}_4^- + 2\text{H}_2\text{O} + 3e^- \rightarrow \text{MnO}_2 + 4\text{OH}^-$ $2\text{OH}^- + \text{SO}_3^{2-} \rightarrow \text{SO}_4^{2-} + \text{H}_2\text{O} + 2e^-$ The balanced equation for the reaction of manganate(VII) ions with sulfite ions is written as $u\text{MnO}_4^- + v\text{H}_2\text{O} + w\text{SO}_3^{2-} \rightarrow x\text{MnO}_2 + y\text{SO}_4^{2-} + z\text{OH}^-$ Which of the statements below are correct?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only