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(C) During the process of photosynthesis,the light-dependent reaction involves the photolysis of water $(H_2O)$.This process splits water molecules in

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water

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(C) During the process of photosynthesis,the light-dependent reaction involves the photolysis of water $(H_2O)$.This process splits water molecules into hydrogen ions $(H^+)$,electrons $(e^-)$,and oxygen $(O_2)$.The oxygen released is a byproduct of this water-splitting reaction,not from carbon dioxide $(CO_2)$.Therefore,the correct source of oxygen liberated during photosynthesis is water.

Column $(A)$	Column $(B)$
$(a)$ Phloem	$(i)$ Excretion
$(b)$ Nephron	$(ii)$ Translocation of food
$(c)$ Veins	$(iii)$ Clotting of blood
$(d)$ Platelets	$(iv)$ Deoxygenated blood

Oxygen liberated during photosynthesis comes from

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