Assertion :Plants are defined as monoecious and dioecious. Reason: Flowers may be bisexual and unisexual.

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
In monecious plants, both male and female flowers are present on the same plant whereas in dioecious plants, male and female flowers are present on different flowers. Hence, assertion is correct.
In bisexual flowers, both male and female reproductive structures i.e. androecium and gynoecium respectively, are present whereas in unisexual flowers, either male or female reproductive structures are present. Hence, reason is also true but it is not the correct explanation for assertion.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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