This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
True statements are all, except 
Select and explain. 
A. Chromosome six harbours the gene for MHC, B. Genes encoding compliments are located adjacent to class I, C. Monocytes have MHC class II antigens on their surfaces, D. Class III MHC does not encode complement
D: Class III MHC does not encode complement
Answer: D: Class III MHC does not encode complement 
Explanation: Class I antigen Expressed on all nucleated cells and platelets Encode cell surface glycoproteins Encoded by 3 closely related loci HLA-A, HLA-B & HLA-C CD8+ T cells widely express class I HLA antigen Class II antigen Expressed on macrophages, B cells and T cells Encode cell surface glycoproteins Have a single loci HLA-D (with 3 surface loci DR,DQ,DP) Class III antigen Encodes complements of the complement system Genes coding for histocompatibility antigens are clustered on a small segment of chromosome 6. This cluster constitutes human MHC or HLA complex The class III molecules loci , are present in between the loci for class I and class II molecules (ref: Harrison's 18/e p2685-2687)