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: Microbiology
[{'content': 'The hypersensitivity reaction involved in the hyper acute rejection of renal transplant is \nSelect and explain. \nA. Type I, B. Type II, C. Type III, D. Type IV', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Type III Pre-existing antibody against donor graft antigens can cause hyperacute graft rejection. . This form of rejection occurs within minutes or hours after transplantation "The graft becomes engorged and purple coloured . These early lesions point to an antigen-antibody reaction at the level of vascular endothelium. The antigen-antibody reaction produces an Ahus-type (type-III) immune complex injury in the vessels of the transplant."', 'role': 'assistant'}]