A) presence of oxygen
B) low\[C{{O}_{2}}\]concentration
C) high\[C{{O}_{2}}\]concentration
D) absence of\[C{{O}_{2}}\]
Correct Answer: B
Solution :
Light causes photosynthesis which leads to reduction in\[C{{O}_{2}}\]concentration\[\to \]synthesis of glycolate\[\to \]oxidation of glycolate\[\to \]ATP synthesis\[\to \]activation of\[{{K}^{+}}\]pump\[\to \]movement of\[{{K}^{+}}\]in guard cells\[\to \]movement of water into guard cells\[\to \]swelling of guard cells\[\to \]opening of stomata.
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