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
[{'content': 'MHC class III genes encode \nSelect and explain. \nA. Complement component C3, B. Interleukin 2, C. Tumor necrosis factor, D. Beta 2 microglobulin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: *HLA class III contains genes for\n• Complement components C2 and C4\xa0of classical pathway (Not C3)\n• Properdin factor B\xa0of alternate pathway\n• Tumor necrosis factor: Alpha and Beta\n• Heat shock protein 70\xa0\n• Enzyme tyrosine hydroxylase\n• Genes for MHC (also known as HLA) are located on short arm of chromosome 6.', 'role': 'assistant'}]