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: . Autoimmune disorder