This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'True about MHC- \nSelect and explain. \nA. Present on chromosome, B. Class II comprises A, B, C loci, C. Class III has complement, D. Class I is involved in mixed leucocyte reaction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Robbins basic pathology 9th edition page no 102 Mainly major histocompatibility complex molecule(MHC) are mainly divided into two MHC1 and MHC2. But several other protiens are encoded in the MHC locus, and some of whicha are called as MHC3 molecules. These include the complement components(C2, C3andbf) and the ctokine tumour necrosing factor and lymphotoxin.', 'role': 'assistant'}]