Answer: Option B
Explanation:
Oxygen is used by all the living organism except the plants as it is a waste product of photosynthesis so plants do not need it.
Though plants itself can produce oxygen and some amount of it is used by the plants for the process of cellular respiration but the plants does not need oxygen from the atmosphere as like that of other organisms.
The excess of the oxygen that is left in the plants is released out into the atmosphere.
