The correct statement/s about Hydrogen bonding is/are

A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom.

B. Intermolecular H bonding is present in $$o$$-nitro phenol

C. Intramolecular $$\mathrm{H}$$ bonding is present in HF.

D. The magnitude of $$\mathrm{H}$$ bonding depends on the physical state of the compound.

E. H-bonding has powerful effect on the structure and properties of compounds

Choose the correct answer from the options given below: