Which of the following compounds is anti-arom | vedclass

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(D) Anti-aromatic compounds are cyclic,planar,fully conjugated,and contain $4n$ $\pi$-electrons (where $n = 1, 2, ...$).$(I)$ Furan: $6$ $\pi$-electro

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$V$ and $VI$

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(D) Anti-aromatic compounds are cyclic,planar,fully conjugated,and contain $4n$ $\pi$-electrons (where $n = 1, 2, ...$).$(I)$ Furan: $6$ $\pi$-electrons (aromatic).$(II)$ Cycloheptatriene: Non-planar (non-aromatic).$(III)$ Cyclooctatetraene: Non-planar tub-shaped (non-aromatic).$(IV)$ Cyclopentadienyl anion: $6$ $\pi$-electrons (aromatic).$(V)$ Cyclopentadienyl cation: $4$ $\pi$-electrons,cyclic,planar,conjugated (anti-aromatic).$(VI)$ Cyclobutadiene: $4$ $\pi$-electrons,cyclic,planar,conjugated (anti-aromatic).Thus,compounds $(V)$ and $(VI)$ are anti-aromatic.

Which of the following compounds is anti-aromatic?

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