Assertion (A) : The companion cells help in maintaining pressure gradient in sieve tubes.
Reason (R) : Companion cell transports water into sieve tube.

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Assertion (A) is correct, but Reason (R) is not correct.

Both Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A).

Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of (A).

Assertion (A) is not correct, but Reason (R) is correct.

answer is B.

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Detailed Solution

Assertion (A) is correct. When sucrose solution is continuously entering into companion cells (loaded by active transport), from mesophyll cells, the sucrose solution further moves through pits from companion cells to sieve tube elements thus creating a concentration gradient between these cells.

Reason (R) is not correct. Companion cell does not transport water into sieve tube.Sucrose is transported in the form of solution. Water alone is not transported via companion cells.

Assertion (A) is correct, but Reason (R) is not correct.

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