Q 1640256113.     Which is the evidence to show that `O_2` released during photosynthesis comes from water?

MHCET 2011
A

Synthesis of carbohydrates and formation of `H_2O` and sulphur by photosynthetic bacteria when supplied with `H_2S` and `CO_2`

B

Release of `O_2` by isolated chloroplasts, when potassium ferrocyanide or some other reducing substance is supplied

C

Release of radioactive `O_2` when water is supplied as `H_2O^{18}`

D

All of the above

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