The white precipitate $(Y)$, obtained on passing colourless and odourless gas $(X)$ through an ammoniacal solution of $\mathrm{NaCl}$, loses about $37 \%$ of its weight on heating and a white residue $(\mathrm{Z})$ of basic nature is left. Identify $(\mathrm{X}),(\mathrm{Y})$ and $(\mathrm{Z})$ from following sets.

• A

  $$\mathrm{N}_{2} \left(\mathrm{NH}_{4}\right)_{2} \mathrm{CO}_{3} \mathrm{NH}_{4} \mathrm{Cl} $$
• B

  $$\mathrm{O}_{2} \mathrm{NaNH}_{4} \mathrm{CO}_{3} \mathrm{NaHCO}_{3} $$
• C

  $$\mathrm{CO}_{2} \mathrm{NH}_{4} \mathrm{HCO}_{3} \left(\mathrm{NH}_{4}\right)_{2} \mathrm{CO}_{3} $$
• Correct answer
  D

  $$\mathrm{CO}_{2} \mathrm{NaHCO}_{3} \mathrm{Na}_{2} \mathrm{CO}_{3} $$

Hence, the correct answer is option: 'D'.