GKFix MCQ Question

Why does the compound R₃P=O exist while R₃N=O (where R is an alkyl group) does not?

• A. Nitrogen is more electronegative than phosphorus.
• B. Phosphorus is smaller than nitrogen.
• C. Phosphorus can utilize d-orbitals to accommodate more than 8 electrons in its valence shell.
• D. Nitrogen cannot form double bonds.