Identify the compound, which has maximum number of no bond resonance structures.
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No bond resonance is a special case of resonance in which delocalization of sigma electron or orbital containg lone pair of electron with adjacent p-orbital. It is also called hyperconjugation.
More be the H-atoms associated (bonded) with C-atom, which is bonded with the benzene ring, more will be the number of 'no bond resonance'

C-attached with the ring has no
-atom

C-attached with the ring has
-atoms.

-attached with the ring has one
-atom. the ring has
-atoms

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