GKFix MCQ Question

For the reaction CO(g) + H2O(g) ⇌ CO2(g) + H2(g), what is the correct expression for Kc?

• A. [CO][H2O]/[CO2][H2]
• B. [CO2][H2]/[CO][H2O]
• C. [CO2]/[CO][H2O][H2]
• D. [H2]/[CO][H2O][CO2]