GKFix MCQ Question

What is the expression for the equilibrium constant Kc for the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g)?

• A. [N₂][H₂]³ / [NH₃]²
• B. [2NH₃] / ([N₂][3H₂])
• C. [NH₃]² / ([N₂][H₂]³)
• D. [NH₃] / ([N₂]^{1/2}[H₂]^{3/2})