Q20. The patient is particularly susceptible to microbial infection because they carry a mutation that dysregulates the function of the complement protein, C5. Laboratory tests determine that while C5b can be generated normally, C5a is non-functional. Which of the following components of the complement response will be deficient in the patient: inflammation, phagocytosis and/or cell lysis? Briefly justify your response. (2-3 sentences) (2 marks)