GKFix MCQ Question

What is the correct expression for the equilibrium constant for the reaction aA + bB ⇌ cC + dD?

• A. [A]^a[B]^b/[C]^c[D]^d
• B. [C]^a[D]^b/[A]^c[B]^d
• C. [C]^c[D]^d/[A]^a[B]^b
• D. [A]^c[B]^d/[C]^a[D]^b