19. In which pathology is the synthesis of complement proteins reduceddue to low supply of amino acids?
A) Autoimmune disorders
B) Liver failure
C) Malnutrition
D) Alzheimer's disease

20. What causes neutropenia in patients with cytotoxic drug therapy?
A) Low neutrophil count
B) Defective neutrophil activation
C) Impaired neutrophil adhesion
D) Reduced production of neutrophils

21. What component of the complement is deficient in liver failure?
A) C4a
B) C3a
C) Complement proteins
D) C1 inhibitor