This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Rejection of allografts are complex process primarily involving - \nSelect and explain. \nA. Immune complex deposition, B. Vascular blockage, C. Cell-mediated immunity and circulationg antibodies, D. Infection', 'role': 'user'}, {'content': "Answer: C \nExplanation: The allograft rejection involves a first set and second set response. The first set response is brought about almost exclusively by T lymphocytes ( cell-mediated. Humoral antibodies are also produced during allograft rejection. Reference:athanarayan & paniker's 9th edition, pg no: 184 <\\p>", 'role': 'assistant'}]