In which of the following compounds are all C | vedclass

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(B) The correct answer is $B$.
In $Benzene$ $(C_6H_6)$,all $C-C$ bonds are equivalent due to resonance.
Due to the delocalization of $\pi$-electrons

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Benzene

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(B) The correct answer is $B$.
In $Benzene$ $(C_6H_6)$,all $C-C$ bonds are equivalent due to resonance.
Due to the delocalization of $\pi$-electrons,the $C-C$ bond length in benzene is intermediate between a single bond $(1.54 \mathring{A})$ and a double bond $(1.34 \ \mathring{A})$,which is $1.39 \ \mathring{A} $.
In other options like $2$-butene,$1$-butene,and $1$-propyne,there are distinct single and double bonds with different bond lengths.

In which of the following compounds are all $C-C$ bond lengths equal?

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