GKFix MCQ Question

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

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