Type IV hypersensitivity reaction is mediated by which of the following________________?
Correct answer: B. Active T cells
- A. B-cells
- B. Active T cells
- C. NK cells
- D. Plasma cells
Explanation
Type IV hypersensitivity is delayed and cell-mediated, relying mainly on sensitised T lymphocytes rather than antibodies. B cells, plasma cells and NK cells are not the defining mediators of this reaction.
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