For which one of the following reaction at equilibrium constant value increases with decrease in temperature.

• A

  PCl_5(g) $\rightleftharpoons$PCl_3(g) + Cl_2(g) $-$ Q kJ

• B

  ${\mathrm{N}}_{2\left(\mathrm{g}\right)}+3{\mathrm{H}}_{2\left(\mathrm{g}\right)}\rightleftharpoons 2{\mathrm{NH}}_{3\left(\mathrm{g}\right)}+\mathrm{Q} \mathrm{kJ}$

• C

  $2{\mathrm{NH}}_{3\left(\mathrm{g}\right)}+\mathrm{Q} \mathrm{kJ} \rightleftharpoons {\mathrm{N}}_{2\left(\mathrm{g}\right)}+3{\mathrm{H}}_{2\left(\mathrm{g}\right)}$

• D

  $2{\mathrm{SO}}_{3\left(\mathrm{g}\right)}+\mathrm{Q} \mathrm{kJ}\rightleftharpoons 2{\mathrm{SO}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}$