Match List I with List II. List I List II (A) N₂ molecule (I) Single bonds only (B) P₄ molecule (II) p -p multiple bonding (C) R₃P=O molecule (III) d -p multiple bonding (D) Transition metal complex with PEt₃ (IV) d -d backbonding Choose the correct answer from the options given below:

Step-by-step solution

Nitrogen ( N ) is a small atom and forms strong p -p multiple bonds with itself, resulting in the N N triple bond in the N₂ molecule. (A matches II) Phosphorus ( P ) is larger and does not effectively form p -p bonds. Instead, it undergoes catenation through P-P single bonds, forming the tetrahedral P₄ molecule. (B matches I) In R₃P=O , phosphorus uses its vacant 3d orbital to overlap with the 2p orbital of oxygen, forming a d -p double bond. (C matches III) Heavier elements like phosphorus and arsenic can act as l