Following criteria should be taken in consideration for resonance. The major contributor is the one with the lower energy. Good contributors generally have all octets satisfied, as many bonds as possible and as little charge separation as possible. Negative charges are more stable on the more electronegative atoms. Resonance stabilization is most important when it serves to delocalize a charge over two or more atoms Observe the following structures H_(2)C=""^(+)underset(I)(N)H_(2) harr""^(+) underset(II)(CH_(2))-NH_(2)

Following criteria should be taken in consideration for resonance. The

1.	Following criteria should be taken in consideration for resonance. The major contributor is the one with the lower energy. Good contributors generally have all octets satisfied, as many bonds as possible and as little charge separation as possible. Negative charges are more stable on the more electronegative atoms. Resonance stabilization is most important when it serves to delocalize a charge over two or more atoms Observe the following structures H_(2)C=""^(+)underset(I)(N)H_(2) harr""^(+) underset(II)(CH_(2))-NH_(2)
Answer» STRUCTURE - I is major contributor in the two resonating structures Structure - II is major contributor in the two resonating structures Both are EQUAL stable Resonance is not possible Answer :B