Assertion : Female gametophyte in angiosperm is eight nucleate.

Reason : Double fertilization occurs in angiosperms.

If both assertion and reason are true and reason is correct explanation of assertion.

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If both assertion and reason are true but reason is not the correct
explanation of assertion.

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If assertion is true but reason is false.

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If both assertion and reason and false.

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Solution

The correct option is B If both assertion and reason are true but reason is not the correct
explanation of assertion.
Female gametophyte in angiosperm is eight nuclei (two polar nuclei, two synergids, one egg cell and three antipodals). It is formed by three successive mitotic divisions. The antipodal and chalazal nuclei undergo cytokinesis but the central cell with two polar nuclei does not undergo cytokinesis.

Double fertilisation and triple fusion is a characteristic of angiosperms.

Therefore, both assertion and reason are true but reason is not the correct explanation of assertion.

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Assertion : Female gametophyte in angiosperm is eight nucleate. Reason : Double fertilization occurs in angiosperms.

Assertion : Female gametophyte in angiosperm is eight nucleate.

Reason : Double fertilization occurs in angiosperms.