This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Tissue graft rejection can be prevented by the suppression of \nSelect and explain. \nA. Plasma antibodies, B. T-cells, C. Allergy producing mast cells and basophils, D. Macropghages', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]