Assertion :All the endodermal cells of the root do not contain Casparian thickenings. Reason: Passage cells are found in endodermis.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Ligno suberised thickenings present on the radial and tangential walls of the endodermal cells in roots are called Casparian thickenings. However some of the endodermal cells do not have these Casparian strips. These cells are called passage cells. These are present opposite to the protoxylem cells.
So, the correct option is A.

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