Graft versus host reaction is caused by_________________?
Correct answer: B. T-lymphocytes
- A. B-Lymphocytes
- B. T-lymphocytes
- C. Monocytes
- D. Leukocytes
Explanation
Graft-versus-host disease occurs when immunocompetent donor T lymphocytes attack the recipient's tissues after transplantation. B lymphocytes produce antibodies but are not the primary mediators of this reaction.
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