Assertion: $1^{o}$ allylic halides are more reactive than $1^{o} R X$ in $S_{N} 1$ reaction
Reason: Allylic carbocation intermediate is stabilised by resonance

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Reactivity of $S_{N} 1$ reaction is compared by the stability of its carbocation intermediate.
$1^{o}$ allylic halides are more reactive than $1^{o}$ $R X$ in $S_{N} 1$ reaction due to the formation of the allylic carbocation.
Allylic carbocation intermediate is stabilised by resonance.
Hence correct option is A

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Assertion: 1o allylic halides are more reactive than 1oRX in SN1 reactionReason: Allylic carbocation intermediate is stabilised by resonance

Assertion: $1^{o}$ allylic halides are more reactive than $1^{o} R X$ in $S_{N} 1$ reaction
Reason: Allylic carbocation intermediate is stabilised by resonance