In which reaction does one nitrogen atom undergo the largest change in oxidation number?
- A$4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O}$
- B$3\text{NO}_2 + \text{H}_2\text{O} \rightarrow 2\text{HNO}_3 + \text{NO}$
- C$2\text{NO} + \text{O}_2 \rightarrow 2\text{NO}_2$
- D$4\text{NH}_3 + 6\text{NO} \rightarrow 5\text{N}_2 + 6\text{H}_2\text{O}$