GKFix MCQ Question

What is the equilibrium constant for the reaction 2Fe(s) + 3H2O(g) ⇌ Fe2O3(s) + 3H2(g)?

• A. [Fe2O3][H2]^3 / ([Fe]^2[H2O]^3]
• B. [H2]^3 / [H2O]^3
• C. [Fe]^2[H2O]^3 / ([Fe2O3][H2]^3]
• D. [H2O]^3 / [H2]^3