Which raw material is responsible for the rel | vedclass

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(C) $1$. Water $(H_2O)$ used in photosynthesis is responsible for the release of oxygen $(O_2)$.$2$. Earlier, it was thought that the source of $O_2$

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$H_2O$

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(C) $1$. Water $(H_2O)$ used in photosynthesis is responsible for the release of oxygen $(O_2)$.$2$. Earlier, it was thought that the source of $O_2$ in photosynthesis was $CO_2$.$3$. However, Ruben and Kamen used a heavy but non-radioactive, stable isotope of oxygen, $^{18}O$, to prove that the $O_2$ evolved during the light reaction comes from $H_2O$ and not from $CO_2$.

Which raw material is responsible for the release of $O_2$ in photosynthesis?

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