Assertion :Gnetales are most advanced gymnosperms. Reason: They have vessels in their xylem as in angiosperms.

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Gymnosperms are the group of seed plants. Gnetales has a vascular system made up of Xylem with tracheids and parenchyma cells and phloem is made of seive cells. However, even though the vessels are absent in the xylem in Cycads and Gingko, this is found in the Gnetales where it seems to have developed from the pitted tracheids, making them similar to the angiosperms.
Hence they are more advanced.
Hence the correct option is A.

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