At $\mathrm{T}(\mathrm{K}), \mathrm{K}_{\mathrm{c}}$ for the reaction $\mathrm{SO}_{2(g)}+\mathrm{NO}_{2(g)} \rightleftharpoons \mathrm{SO}_{3(g)}+\mathrm{NO}_{(g)}$ is 16 . If initially one mole each of all the four gases are taken in one litre vessel, the equilibrium concentrations of $\mathrm{SO}_{3(g)}$ and $\mathrm{SO}_{2(g)}$ in $\mathrm{mol} \mathrm{L}^{-1}$ respectively are;

• Correct answer
  A

  $1.6,0.4$
• B

  $0.4,1.6$
• C

  $0.8,3.2$
• D

  $3.2,0.8$

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