Oxygen is not produced during photosynthesis by

Option 1) Cycas

Option 2) Nostoc

Option 3) Green sulphur bacteria

Option 4) Chara

Answers (1)

Since Chara and Cycas comes under plant kingdom so they perform oxygenic photosynthesis.  Green sulphur bacteria utilises H2S instead of H2O and performs Anoxygenic Photosynthesis or do not evolve oxygen.

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