Assertion :In the case of polyfunctional compounds, the choice of principal functional group is made on the basis of order of preference. Reason: The order of decrease priority for some functional group is $- C O O H, - S O_{3} H, - C O O R, - C O C l_{3}, - C O N H_{2}, - C N, - C H = O, - O H, C = O, C = C, - C = C -$

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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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
According to IUPAC Nomenclature rules, the choice of principal functional group is made on the basis of order of preference.
The order of decrease priority for some functional group is -
$- C O O H > - S O_{3} H > - C O O R > - C O {C l}_{3} > - C O N H_{2} > - C N > - C H = O > - O H > C = O > - C = C -$
Hence, both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion :In the case of polyfunctional compounds, the choice of principal functional group is made on the basis of order of preference. Reason: The order of decrease priority for some functional group is −COOH,−SO3H,−COOR,−COCl3,−CONH2,−CN,−CH=O,−OH,C=O,C=C,−C=C−