Which of the following compounds produces N₂ gas on heating?

On heating, ammonium nitrate forms water and nitrous oxide, ammonium sulfate forms ammonia and sulfuric acid, zinc nitrate forms zinc oxide, and nitrogen dioxide and oxygen on heating. On barium nitrate releases nitrogen gas on heating, along with the formation of barium.

$$\begin{gathered} {\mathrm{NH}}_4{\mathrm{NO}}_3 \stackrel{∆}{\to } {\mathrm{N}}_2\mathrm{O}\uparrow + 2{\mathrm{H}}_2\mathrm{O} \\ {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4 \stackrel{∆}{\to } 2{\mathrm{NH}}_3\uparrow + {\mathrm{H}}_2{\mathrm{SO}}_4 \\ 2\mathrm{Zn}{\left({\mathrm{NO}}_3\right)}_2 \stackrel{∆}{\to } 2\mathrm{ZnO} + 4{\mathrm{NO}}_2\uparrow + {\mathrm{O}}_2 \\ 2{\mathrm{Ba}}_2{\mathrm{N}}_3\stackrel{∆}{\to }4\mathrm{Ba} + 3{\mathrm{N}}_2\uparrow \end{gathered}$$