Assertion :The IUPAC name of ${C H}_{3} - C H = C H - C \equiv C - H$ is pent-3-en-1-yne and not pent-2-en-4-yne Reason: Lowest locant rule for multiple bond is preferred

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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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The principal functional group are assigned the lowest possible locant. According to the preference of locant number, the IUPAC name of $C H_{3} - C H = C H - C \equiv C H$ is pent-3-en-1-yne and not pent-2-en-4-yne. Lowest locant rule for the multiple bond is assigned for naming of the compound
$C H_{3} - C H = C H - C \equiv C H$ .

Hence, option (a) is correct.

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