Assertion (A): Stomata are usually open in the day time and close during the night. Reason (R): ...

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Assertion (A): Stomata are usually open in the day time and close during the night.
Reason (R): The opening or closing of stomata is due to the change in the turgidity of the guard cells.
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.
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