GKFix MCQ Question

What is the expression for Kp for the reaction CH₄(g) + H₂O(g) ⇌ CO(g) + 3H₂(g)?

• A. Kp = (P_CO × P_H₂³) / (P_CH₄ × P_H₂O)
• B. Kp = (P_CH₄ × P_H₂O) / (P_CO × P_H₂³)
• C. Kp = (P_CO × P_H₂) / (P_CH₄ × P_H₂O)
• D. Kp = (P_CH₄ × P_H₂O) / (P_CO × P_H₂)