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.

1. A \[\mathrm{N}_{2} \left(\mathrm{NH}_{4}\right)_{2} \mathrm{CO}_{3} \mathrm{NH}_{4} \mathrm{Cl}
   \]
2. B \[\mathrm{O}_{2} \mathrm{NaNH}_{4} \mathrm{CO}_{3} \mathrm{NaHCO}_{3}
   \]
3. C \[\mathrm{CO}_{2} \mathrm{NH}_{4} \mathrm{HCO}_{3} \left(\mathrm{NH}_{4}\right)_{2} \mathrm{CO}_{3}
   \]
4. D \[\mathrm{CO}_{2} \mathrm{NaHCO}_{3} \mathrm{Na}_{2} \mathrm{CO}_{3}
   \]