The equilibrium constants of the following are : <br> $N_2 + 3H_2 \rightleftharpoons 2NH_3$ <br> $N_2 + O_2 \rightleftharpoons 2NO$ <br> $H_2 + \frac{1}{2} O_2 \to H_2O$ <br> The equilibrium constant (K) of the reaction : <br> $2NH_3 + \frac{5}{2} O_2 \stackrel{K}\rightleftharpoons 2NO + 3H_2O,$ will be

Question

( A ) $K_2 K_3^3/K_1$
( B ) $K_2 K_3/K_1$
( C ) $K_2^3 K_3/K_1$
( D ) $K_1 K_3^3/K_2$