The equilibrium constants of the following are
$$N_2 + 3H_2 \rightleftharpoons 2NH_3 K_1$$
$$N_2 + O_2 \rightleftharpoons 2NO K_2$$
$$H_2 + \frac{1}{2} O_2 \rightarrow H_2O K_3$$
The equilibrium constant (K) of the reaction

A

$$\frac{K_2K_3}{K_1}$$

B

$$\frac{K_2^3K_3}{K_1}$$

C

$$\frac{K_1K_3^3}{K_2}$$

D

$$\frac{K_2K_3^3}{K_1}$$