GKFix MCQ Question

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

• A. (p_N₂)(p_H₂)³ / (p_NH₃)²
• B. (p_NH₃) / (p_N₂ × p_H₂)
• C. (p_NH₃)² / (p_N₂ × (p_H₂)³)
• D. (p_N₂)²(p_H₂) / (p_NH₃)