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(A) The correct order of stability is $I > II > III$.Structure $I$ is a benzyl carbocation,which is highly stabilized by resonance with the benzene ri

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$I > II > III$

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(A) The correct order of stability is $I > II > III$.Structure $I$ is a benzyl carbocation,which is highly stabilized by resonance with the benzene ring.Structure $II$ is a secondary allylic carbocation,which is stabilized by both resonance and hyperconjugation.Structure $III$ is a tertiary carbocation,which is stabilized by the inductive effect and hyperconjugation of nine $\alpha$-hydrogens. However,resonance stabilization in $I$ and $II$ generally outweighs the inductive/hyperconjugative stabilization of $III$ in this context.

$A$. Acetaldehyde,vinyl alcohol	$1$. Enantiomers
$B$. Eclipsed and staggered ethane	$2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol	$3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine	$4$. Conformational isomers
	$5$. Metamers

Which of the following options is the correct order of relative stabilities of cations $I$,$II$,and $III$ as shown below (most stable first)?
$(I) \, C_6H_5CH_2^+$
$(II) \, CH_2=CH-CH_2-CH^+-CH_3$
$(III) \, (CH_3)_3C^+$

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Match the following:
$A$. Acetaldehyde,vinyl alcohol $1$. Enantiomers
$B$. Eclipsed and staggered ethane $2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol $3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine $4$. Conformational isomers
$5$. Metamers

The compound $(CH_3)_2C = CH - CH(CH_3)COOH$ exhibits:

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Which of the following options is the correct order of relative stabilities of cations $I$,$II$,and $III$ as shown below (most stable first)?$(I) \, C_6H_5CH_2^+$$(II) \, CH_2=CH-CH_2-CH^+-CH_3$$(III) \, (CH_3)_3C^+$