GKFix MCQ Question

What is the correct equilibrium expression for the reaction: 4NO(g) + 6H2O(g) ⇌ 4NH3(g) + 5O2(g)?

• A. Kc = [NO]^4[H2O]^6 / [NH3]^4[O2]^5
• B. Kc = [NH3]^4[O2]^5 / [NO]^4[H2O]^6
• C. Kc = [NH3]^4[H2O]^6 / [NO]^4[O2]^5
• D. Kc = [NO]^4[O2]^5 / [NH3]^4[H2O]^6