Correct option is B
Oxygen (O2) is the gas produced during the process of photosynthesis.
· Photosynthesis is the biological process that occurs in green plants, algae, and some bacteria, where they convert carbon dioxide (CO2) and water (H2O) into glucose (a type of sugar) and oxygen (O2) in the presence of sunlight.
· This process takes place in chloroplasts, which contain the pigment chlorophyll, allowing plants to capture energy from sunlight and convert it into chemical energy in the form of glucose.
· As a byproduct of this process, oxygen is released into the atmosphere, which is essential for the respiration of most living organisms on Earth.