Which one of the following pairs of structures represent the phenomeno

1.	Which one of the following pairs of structures represent the phenomenon of resonance?
Answer» `H_(2)C=CH-OVERSET(overset(O)(\|\|))(C)-H, Coverset(+)(H_(2))-CH=overset(overset(O^(-))(\|))(C)-H` `CH_(2)=CH-overset(+)(CH)CL," "overset(+)(CH_(2))-CH=CH-Cl` `(CH_(3))_(2)CH-overset(overset(O)(\|\|))(C)-O^(-),(CH_(3))_(2)CH-overset(overset(O^(-))(\|))(C)=O` `CH_(3)-CH_(2)-overset(overset(O)(\|\|))(C)-CH_(3), CH_(3)-CH=overset(overset(O^(-))(\|))(C)-CH_(3)` SOLUTION :A) `H_2C = CH- overset(O)overset(\|\|)C-H , Coverset(+)H_2 - CH= overset(O^(-))overset(\|)C-H` B) `CH_2 = CH - overset(+)(CH)Cl , overset(+)(CH_2) - CH = CH - Cl` C) `(CH_3)_2 CH - overset(O)overset(\|\|)C-O^(-) , (CH_3)_2CH- overset(O^(-))overset(\|)C=O`

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