Please sir solve it

Which of the following compound does not exhibit Hydrogen bonding?

Dear student,

hydrogen bonding is present if the compound has an electronegative atom bonded to the hydrogen.
In compound 1 and 2, the oxygen atom is bonded with hydrogen atom and in compound 4, nitrogen is bonded to the hydrogen atom. But in compound 3, oxygen is not bonded to the hydrogen atom.
Hence compound 3 does not show hydrogen bonding.
Hence the correct answer is 3.

Regards

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