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
HLA 2 is linked with? 
Select and explain. 
A. Graft rejection, B. Killing of viral infected cells, C. Graft versus host disease, D. Susceptibility to autoimmune diseases
C: Graft versus host disease
Answer: C: Graft versus host disease 
Explanation: MHC class I is responsible for graft rejection and cell mediated cytolysis of viral infected or tumor cells.
MHC-II is responsible for graft versus host response and mixed leukocyte reaction
MHC-III is involved in susceptibility to autoimmune diseases like SLE.