The equilibrium constant for the reaction $2SO_2(g)+O_2(g) \to 2SO_3(g)$ would be :

Question

$\begin{array}{1 1} (a)\; K= 2[SO_3]/2[SO_2][O_2] \\ (b)\; K= 2[SO_2]/[O_2][SO_3] \\ (c) \;[SO_3]^2[SO_2]^2[O_2] \\ (d)\; [SO_2]^2[O_2]/[SO_3]^2 \end{array} $