GKFix MCQ Question

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

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