In which of these equations is the change shown for the underlined species correct? 1. (oxidation) $\underline{\text{CH}_4} + 2\text{O}_2 \rightarrow \underline{\text{CO}_2} + 2\text{H}_2\text{O}$ 2. (reduction) $2\text{H}_2\underline{\text{S}} + \text{SO}_2 \rightarrow \underline{3\text{S}} + 2\text{H}_2\text{O}$ 3. (reduction) $\text{BrO}_3^- + 5\underline{\text{Br}^-} + 6\text{H}^+ \rightarrow \underline{3\text{Br}_2} + 3\text{H}_2\text{O}$
- A1 only
- B2 only
- C1 and 3
- D2 and 3