Out of the following redox reactions,
\[
\text{I. NH}_4\text{NO}_3 \xrightarrow{\Delta} \text{N}_2\text{O} + 2\text{H}_2\text{O}
\]
\[
\text{II. NH}_4\text{NO}_2 \xrightarrow{\Delta} \text{N}_2 + 2\text{H}_2\text{O}
\]
\[
\text{III. PCl}_5 \xrightarrow{\Delta} \text{PCl}_3 + \text{Cl}_2
\]
Disproportionation is not shown in