GKFix MCQ Question

What is the correct expression for Q in the dissociation of PCl₅: PCl₅ ⇌ PCl₃ + Cl₂?

• A. [PCl₅]/[PCl₃][Cl₂]
• B. [PCl₃] + [Cl₂]/[PCl₅]
• C. [PCl₃][Cl₂]/[PCl₅]
• D. [PCl₅][PCl₃][Cl₂]