Which of the following is a product of photosynthesis?

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose, while releasing oxygen as a byproduct. The overall chemical equation for photosynthesis can be summarized as:

6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂

In this process, carbon dioxide and water are utilized to produce glucose and oxygen. While carbon dioxide and water are reactants in photosynthesis, oxygen is the product that is released into the atmosphere as a result of this process. Therefore, oxygen is indeed a product of photosynthesis. This makes it essential for aerobic organisms, as it is required for respiration.