Answer:
The correct answer will be options-A and D.
Explanation:
Photosynthesis is a complex process which forms the glucose, the energy molecule of the plant. Photosynthesis takes place in the two phases: light-dependent reaction and light-independent reactions.
The light-dependent reaction leads to the breakdown of the water molecule which produces oxygen whereas in light-independent reaction, the carbon dioxide gets fixed during the carboxylation step of cycle utilizing the carbon dioxide.
Therefore, if photosynthesis takes place then it will lead to a rise in the level of oxygen and reduction in the amount of carbon dioxide. Thus, options-A and D are the correct answer.
