Among the following sets,the most stable ioni | vedclass

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(D) The stability of cyclic,planar,conjugated ionic species is determined by $H$ückel's rule,which states that a species is aromatic and highly stable

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(D) The stability of cyclic,planar,conjugated ionic species is determined by $H$ückel's rule,which states that a species is aromatic and highly stable if it contains $(4n+2) \pi$ electrons,where $n$ is an integer $(n = 0, 1, 2, ...)$.$1$. Indenyl anion: It has $10 \pi$ electrons $(n=2)$,which follows $H$ückel's rule and is aromatic.$2$. Cyclopropenyl cation: It has $2 \pi$ electrons $(n=0)$,which follows $H$ückel's rule and is aromatic.Since both species in option $(d)$ are aromatic,they are the most stable ionic species among the given sets.

Among the following sets,the most stable ionic species are

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