19. Which conditions are associated with secondaryimmunodeficiencies?
A) Chronic granulomatous disease, Job's syndrome, cyclic neutropenia
B) Burns, sarcoidosis, multiple myeloma, malnutrition
C) Paroxysmal nocturnal hemoglobinuria, hereditary angioedema
D) Phagocyte deficiencies, liver failure, Acquired immunodeficiencysyndrome (AIDS)

20. What happens to the synthesis of complement proteins in liverfailure?
A) Unaffected by the condition
B) Increased due to high concentration of pyogenic bacteria
C) Reduced due to low supply of amino acids
D) Enhanced due to elevated gamma interferon levels

21. What is the defect in neutrophils of patients with Chediak–Higashisyndrome?
A) Lack of T-cell signaling
B) Reduced production of immunoglobulins
C) Decreased consumption of oxygen
D) Defective chemotaxis and altered ability to kill microorganisms