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# The oxygen in photosynthesis is released from

$\begin{array}{1 1}(A)\;CO_2\\(B)\;H_2O\\(C)\;Both\;CO_2\;and\;H_2O\\(D)\;\text{Chlorophyll}\end{array}$

The oxygen in photosynthesis is released from $H_2O$
Hence (B) is the correct answer.