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: Microbiology
[{'content': 'The HLA class III region genes are impoant elements in: September 2012 \nSelect and explain. \nA. Transplant rejection phenomenon, B. Governing susceptibility to autoimmune disease, C. Immune surveillance, D. Antigen presentation and elimination', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Governing susceptibility to autoimmune disease', 'role': 'assistant'}]