If a patient with a genetic defect in the complement system develops a bacterial infection, which immunological deficiency is most likely?

💡 Explanation

The complement system enhances opsonization and phagocytosis by coating pathogens and attracting phagocytes; because the patient has a defect in this system, these processes are diminished. Therefore, the correct answer is C, rather than A, B or D which depend on T-cells or other components.

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