Out of the following which pentadiens shows double bond character between `C_(2) -C(3)` bond although it appers to be a single bond

Monjur Alahi

Out of the following which pentadiens shows double bond character between `C_(2) -C(3)` bond although it appers to be a single bond
A. `CH_(3)-CH=C=CH-CH_(3)`
B. `CH_(2)=CH-CH=C-CH_(3)`
C. `CH_(3)CH_(2)-CH=CH_(2)`
D. `CH_(2)=CH-CH_(2)-CH=CH_(2)`


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Salim Ahmed Kawsar

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Correct Answer - B
Due to delocalisation of `pi` electrons `C_(2)-C_(3)` bond acquired double bond character.

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