Answer:
B. Photosystem II
Step-by-step explanation:
The process in which oxygen is produced during the light-dependent reactions of photosynthesis is called "photolysis." Photolysis is the splitting of water molecules using light energy. In this process, water molecules (H2O) are broken down into oxygen (O2) and protons (H+ ions) by the energy from photons (light). The oxygen is released into the atmosphere as a byproduct, while the protons and electrons generated are used in further reactions to produce chemical energy in the form of adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide phosphate (NADPH), which are essential for the synthesis of glucose and other organic compounds in photosynthesis.