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
The hypersensitivity reaction involved in the hyper acute rejection of renal transplant is - 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
B: Type II
Answer: B: Type II 
Explanation: Type II hypersensitivity reaction is initiated by IgG or rarely IgM antibodies that react either with cell surface or tissue antigen. Cell or tissue damage occurs in the presence of complement or mononuclear cells. Hyperacute rejection reaction against an organ transplant is example of type II hypersensitivity reaction in which cytotoxic antibodies are formed against donor antigen. Reference : Harsh mohan text book of pathology, 7th edition, pg no: 60 <\p>