For the Reaction 2NO(g) + O₂(g) $\rightleftharpoons$ 2NO₂(g) at 750°C, What Is the Relationship Between K_c and What

For the reaction 2NO(g) + O₂(g) $\rightleftharpoons$ 2NO₂(g) at 750°C, what is the relationship between K_c and K_p?

A) K_c = K_p
B) K_c = K_p × (RT) ^-1
C) K_c = K_p = 1.0
D) K_c = K_p × (RT) ^¾
E) K_c = K_p × (RT) ¹