GKFix MCQ Question

What is the correct expression for Kc for the reaction 2NO(g) + Br2(g) ⇌ 2NOBr(g)?

• A. Kc = [NO]^2[Br2] / [NOBr]^2
• B. Kc = [NOBr]^2 / ([NO]^2[Br2])
• C. Kc = [NOBr] / ([NO][Br2])
• D. Kc = [NOBr]^2 / [Br2]