$\mathrm{Al}+\mathrm{X}\to \mathrm{Y}\stackrel{\mathrm{Water}}{\to }\mathrm{Z}+{\mathrm{NH}}_3$

 

Here X, Y and Z are 

• A

  ${\mathrm{O}}_2,{\mathrm{Al}}_2{\mathrm{O}}_3,\mathrm{Al}{\left(\mathrm{OH}\right)}_3$

• B

  ${\mathrm{N}}_2,\mathrm{AlN},{\mathrm{Al}}_2{\mathrm{O}}_3$

• C

  ${\mathrm{N}}_2,\mathrm{AlN},\mathrm{Al}{\left(\mathrm{OH}\right)}_3$

• D

  ${\mathrm{CO}}_2,{\mathrm{Al}}_4{\mathrm{C}}_3,{\mathrm{CH}}_4$