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(A) The rate of electrophilic addition of $H^{+}$ to an alkene depends on the stability of the resulting carbocation intermediate. The more stable the

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(A) The rate of electrophilic addition of $H^{+}$ to an alkene depends on the stability of the resulting carbocation intermediate. The more stable the carbocation,the faster the reaction.$(A)$ Vinylcyclopropane: Protonation of the double bond leads to a carbocation that is stabilized by the cyclopropyl group through conjugation (cyclopropylmethyl cation),which is exceptionally stable due to bent bonds and charge delocalization.$(B)$ Styrene: Protonation leads to a benzylic carbocation,which is stabilized by resonance with the phenyl ring.$(C)$ Cyclobutene: Protonation leads to a simple secondary carbocation.$(D)$ Methylenecyclohexane: Protonation leads to a tertiary carbocation.Among these,the cyclopropylmethyl cation formed from vinylcyclopropane is the most stable due to the unique electronic effects of the cyclopropyl ring (often described as 'homoconjugation' or 'bent bonds'). Therefore,the addition of $H^{+}$ to vinylcyclopropane is the fastest.

In which of the following species,addition of $H^{+}$ will be faster in comparison to other three species?

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