Carbon monoxide, CO, nitrogen dioxide, $\text{NO}_2$, and sulfur dioxide, $\text{SO}_2$, are all pollutants in the atmosphere. Which reaction takes place in the atmosphere?
- ACO is spontaneously oxidised to $\text{CO}_2$.
- B$\text{NO}_2$ is reduced to NO by $\text{SO}_2$.
- C$\text{NO}_2$ is reduced to NO by CO.
- D$\text{SO}_2$ is oxidised to $\text{SO}_3$ by $\text{CO}_2$.