GKFix MCQ Question

What is the correct expression for Kp for the reaction: COCl₂(g) ⇌ CO(g) + Cl₂(g)?

• A. Kp = (P_CO × P_Cl₂) / P_COCl₂
• B. Kp = P_COCl₂ / (P_CO × P_Cl₂)
• C. Kp = (P_COCl₂ × P_Cl₂) / P_CO
• D. Kp = (P_COCl₂ × P_CO) / P_Cl₂