A) Forming a film impervious to water over the stomata
B) Preventing K+ ion uptake, thus decreasing the osmotic concentration of the guard cells and keeping them flaccid
C) Inducing starch formation, thus decreasing the osmotic concentration of the guard cells and keeping them flaccid
D) Increasing respiration, thus increasing\[C{{O}_{2}}\]concentration in the guard cells which helps in keeping the guard cells flaccid
Correct Answer: B
Solution :
ABA promotes closing of stomata.
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