Calculate the value of equilibrium constant for a reaction at 400K $2NOCl(g)2NO(g) + Cl(g)$ $\Delta S$ and $\Delta H$ are 122 J/Kmol and 77.2 kJ/mol respectively.

Question

$\begin {array} {1 1} (A)\;1.96 \times 10^{-4} & \quad (B)\;19.6 \times 10^{-4} \\ (C)\;19.6 \times 10^{-2} & \quad (D)\;1.96 \times 10^{-2} \end {array}$