A chloride salt solution acidified with dil. ${\mathrm{HNO}}_3$  gives a curdy white precipitate, $\left[\mathrm{A}\right]$, on addition of ${\mathrm{AgNO}}_3$. [A] on treatment with ${\mathrm{NH}}_4\mathrm{OH}$ gives a clear solution, B.

• A

  $\mathrm{H}\left[{\mathrm{AgCl}}_3\right]\&\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}$
• B

  $\mathrm{H}\left[{\mathrm{AgCl}}_3\right] \& \left({\mathrm{NH}}_4\right)\left[\mathrm{Ag}(\mathrm{OH}{)}_2\right]$
• Correct answer
  C

  $\mathrm{AgCl} \& \left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}$
• D

  $\mathrm{AgCl} \& \left({\mathrm{NH}}_4\right)\left[\mathrm{Ag}(\mathrm{OH}{)}_2\right]$

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