Assertion :In cyathium, several male flowers surround a single female flower. Reason: The involucre is nectariferous.

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 cyathium, several male flowers surround a single female flower and the involucre is nectariferous. Both assertion and reason are correct but Reason is not the correct explanation for assertion. Involucre is nectariferous but does not justify the cyathium inflorescence. In cyathium one extremely reduced female flower standing in the centre at the base of the involucre, consisting of an ovary on a short stem with pistil and surrounded by five groups one group at the base of each bracteole of
extremely reduced male flowers, which each consist of a single anther on a stem.
Therefore, the correct option is B.

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