Q .     Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out of the above statements using one of the following options.

AIPMT 2016
A

Both processes can not happen simultaneously.

B

Both processes can happen together because the diffusion coefficient of water and `CO_2` is different.

C

The above processes can only happen during night time.

D

One process happen during day time and other at night.

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