This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunity, Subject name: Pathology
[{'content': 'MHC III codes for \nSelect and explain. \nA. TNF alpha, B. IL 1, C. HLA A, D. HLAB', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) TNF alpha(Ref: Robbins 9th/pg 195; 8th/pg 191)MHC III: No direct role in immune system QCodes for:complement components C2, C4, properdin, factor B QTNF, HSP-70, Tyrosine hydroxylase', 'role': 'assistant'}]