${\mathrm{Al}}_2{\mathrm{O}}_3+\mathrm{C}+{\mathrm{N}}_2\stackrel{\mathrm{\Delta }}{⟶}\mathrm{X}+\mathrm{Y}$ If X is a solid and Y is a gas, the correct statement is

Both X and Y are acidic

Y on reduction gives metal

X on hydrolysis gives ammonia

Both X and Y are combustable