16. What is the cause of neutropenia?
A) Mutation in the gene encoding neutrophil esterase
B) Deficient neutrophil esterase
C) Decreased production of neutrophils
D) Cytotoxic drugs

17. What is the main concern during the low neutrophil count in cyclicneutropenia?
A) Inadequate phagocytosis
B) Increased susceptibility to fungal infections
C) Susceptibility to viral infections
D) Life-threatening bacterial infections

18. What is the essential role of myeloperoxidase?
A) Killing ingested microorganisms
B) Production of hypochlorite
C) Activation of complement
D) Attaching decay-accelerating factor to cell membrane