GKFix MCQ Question

What is the equilibrium constant for the reaction 2A(g) ⇌ B(g) + C(g)?

• A. [A]^2 / ([B][C])
• B. [B]^2[C]^2 / [A]
• C. [B][C] / [A]^2
• D. [A] / ([B]^2[C]^2]