GKFix MCQ Question

Why is the H-P-H bond angle in PH₃ smaller than the H-N-H bond angle in NH₃?

• A. Because phosphorus is less electronegative than nitrogen
• B. Because P-H bonds are longer than N-H bonds
• C. Due to the presence of a lone pair on phosphorus causing greater repulsion
• D. Because phosphorus has vacant d-orbitals