This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Immunological reaction against transplanted organ is mediated by- 
Select and explain. 
A. B-cells, B. NK cells, C. T-cells, D. Granulocytes
C: T-cells
Answer: C: T-cells 
Explanation: Reference:Robbins basic pathology 9th edition pg no:137 : Cytotoxic T cell in the grafted tissue cause parenchymal and endothelial cell death.cytokine secreting CD 4+ tell trigger inflammatory reaction