Final answer:
Lysosomal enzymes involved in ingesting a pathogen produce various reactive substances, but complement is not one of them; it is produced by the immune system independently.
Step-by-step explanation:
After ingesting a pathogen, lysosomal enzymes produce a variety of reactive substances to destroy the pathogen. However, among the substances listed — hypochlorous acid (HOCl), hydroxyl radicals (OH•), hydrogen peroxide (H2O2), and superoxide anion (O2−) — lysosomal enzymes do not produce complement. Complement is a part of the immune system but is not generated by lysosomes. Instead, it consists of blood plasma proteins and is part of the innate immune response that enhances the ability of antibodies and phagocytic cells to clear pathogens and damaged cells.