On heating ammonium dichromate and barium azide separately we get
A. `N_(2)` in both cases
B. `N_(2)` with ammonium dichromate and NO with barium azide
C. `N_(2)O` with ammonium dichromate and `N_(2)` with barium azide
D. `N_(2)O` with ammonium dichromate and `N_(2)O)` with barium azide