Oxygen liberated during photosynthesis c...

Oxygen liberated during photosynthesis comes from

A

Realease of `.^(18)O` if water contains the same

B

Isolated chloroplast supplied with reducing agent like potassium ferrocyanide evolves `O_(2)` even in absence of `CO_(2)`

C

Photosynthetic bacteria do not liberate `O_(2)` and they use `H_(2)S` for obtaining reducing power.

D

All the above.

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The correct Answer is:

D

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