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: Pathology
MHC restriction is a pa of all except ? 
Select and explain. 
A. Antiviral cytotoxic T cell, B. Antibacterial helper T cell/cytotoxic cells, C. Allograft rejection, D. Autoimmune disorder
D: Autoimmune disorder
Answer: D: Autoimmune disorder 
Explanation: Ans. is d i.e., Autoimmune disorder MHC - Class I restriction Graft rejection Cytotoxic cell mediated cytolysis of viral infected or tumor cells. MHC - Class II restriction Graft versis host response Mixed leukocyte reaction