Which will not form precipitation after addition of $\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3$ in presence of $\mathrm{NH}_4 \mathrm{Cl}$ ?

• A

  $\mathrm{Mg}$
• B

  $\mathrm{Ba}$
• Correct answer
  C

  $\mathrm{Sn}$
• D

  $\mathrm{Sr}$

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