Assertion :
In case of vegetatively propagated crops, pure-line selection is not required.
Reason: Hybrid vigour is mostly used in vegetatively propagated plants.

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 C Assertion is correct but Reason is incorrect
vegetative propagation is a form of asexual reproduction, in vegetatively propagated plants pure line selection is not required as they have the same genotype.
hybrid vigour occurs when the hybrid offspring have increased vigour towards either of the parents.
So the correct answer is option C.

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