You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The hypersensitivity reaction involved in the hyper acute rejection of renal transplant is and explain in detail?
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."