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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