A: Bacteria enter only the polyploid cells of | vedclass

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(C) The assertion is correct because,during the process of root nodule formation in legumes,the bacteria (e.g.,$Rhizobium$) specifically infect and en

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Assertion is correct,but Reason is incorrect.

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(C) The assertion is correct because,during the process of root nodule formation in legumes,the bacteria (e.g.,$Rhizobium$) specifically infect and enter the polyploid cells of the root cortex.However,the reason is incorrect because it is the bacteria that produce cytokinins,which in turn induce polyploidy in the host plant cells,rather than the host cells providing cytokinins to the bacteria to promote bacterial cell division.

$A$: Bacteria enter only the polyploid cells of the root cortex.
$R$: These cells provide cytokinins to bacteria,which promote bacterial cell division.

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$A$: Bacteria enter only the polyploid cells of the root cortex.$R$: These cells provide cytokinins to bacteria,which promote bacterial cell division.