Which of the following substances is a product of photosynthesis?

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose, using carbon dioxide and water. During this process, oxygen is produced as a byproduct. The overall equation for photosynthesis can be summarized as:

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

This indicates that carbon dioxide and water are reactants, while glucose and oxygen are the products.

Given this understanding, both glucose and oxygen are indeed products of photosynthesis. Glucose serves as an energy source for the plant, while oxygen is released into the atmosphere, which is vital for the survival of most living organisms on Earth. Thus, the response that includes both oxygen and glucose captures the comprehensive outcome of the photosynthetic process.