For the reaction <br> $2NO_2 (g) \rightleftharpoons 2 NO (g) + O_2(g)$ <br> ($K_c = 1.8 \times 10^{-6}$ at $184^{\circ}$ C ) <br> ($R = 0.00831\; k J/(mol.K)$ ) <br> When $K_p$ and $K_c$ are compared at $184^{\circ} C$ it is found that :

Question

( A ) $K_p = K_c$
( B ) $K_p$ is greater than $K_c$
( C ) whether $K_p$ is greater than, less than or equal to $K_c$ depends upon the total gas pressure
( D ) $K_p$ is less than $K_c$