21. The Immune System
Antigens
Multiple Choice
Multiple ChoiceWhich of the following cell types are antigen-presenting cells (APCs).
1. Macrophages 2. Neutrophils 3. B cells 4. T cells 5.Plasma Cells
A
1 & 3.
B
4 & 5.
C
1, 2 & 3.
D
1 & 2.
E
3 & 4.
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