Cell type that lacks HLA antigen is:: (A) Monocyte, (B) Thrombocyte, (C) Neutrophil, (D) Red blood cell
Answer is D. Class I MHC is expressed on all nucleated cells and platelets Class II MHC is expressed on APCs (macrophages, monocytes and dendritic cells), B- cells, Endothelial cells, and fibroblasts.