<prompt> Cell type which lacks HLA antigen is:MonocyteThrombocytesNeutrophilRed blood cell  <response>: Ans. is d i.e., Red Blood cell Class IMHC molecules are expressed on all nucleated cells and plateletsClass II MHC molecules are expressed on antigen presenting cells macrophages, dendritic and B cellsTissueMHC class IMHC class nLymphoid tissues T cellsB cellsMacrophagesOther antigen-presenting cells eg Langerhans cellsEpithelial cells of the thymusOther nucleated cells Neutrophils-Hepatocytes-Kidney-Brain-Non -nucleated cells Red blood cells--Thrombocytes- 