Which of the following processes add oxygen to the atmosphere?

Combustion

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Respiration

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Photosynthesis

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Denitrification

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Solution

The correct option is C Photosynthesis

Photosynthesis is the process in which green plants make their own food in the presence of sunlight. In this process, oxygen is released into the atmosphere as a byproduct.

Combustion and respiration are oxygen utilising processes.

Denitrification is the process in which nitrites are converted back into atmospheric nitrogen.

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