Answer:
A. Point C
Explanation:
The plant which is evolving most oxygen is performing the most photosynthesis because during photosynthesis inorganic carbon dioxide and water react in the presence of sunlight to synthesis organic molecule known as glucose and oxygen is evolved.
The reaction for photosynthesis is depicted as under:
6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂
(carbon (water) (glucose ) (oxygen)
dioxide)
So, more evolution of O₂ (oxygen) implies more photosynthesis.
