Which equation shows the first stage in extracting zinc from zinc blende?
- A$2\text{ZnS} + 3\text{O}_2 \rightarrow 2\text{ZnO} + 2\text{SO}_2$
- B$\text{ZnS} + \text{H}_2\text{O} \rightarrow \text{ZnO} + \text{H}_2\text{S}$
- C$\text{ZnO} + \text{CO} \rightarrow \text{Zn} + \text{CO}_2$
- D$\text{ZnO} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2\text{O}$