Step 1: Concept
Intermolecular H-bonding requires H bonded to highly electronegative N, O, or F.
Step 2: Meaning
Molecules lacking a proton directly attached to N, O, or F cannot form H-bonds with each other.
Step 3: Analysis
Diethylether ($CH_3CH_2OCH_2CH_3$) has oxygen, but all hydrogens are bonded to carbons. Others have O-H or N-H bonds.
Step 4: Conclusion
Diethylether lacks intermolecular H-bonding.
Final Answer: (D)