Cell type which lacks HLA antigen is -: (A) Monocyte, (B) Thrombocytes, (C) Neutrophil, (D) Red blood cell
Answer is D. Class I products of the genes of the major histocompatibility complex (MHC), HLA-A, -B, and -C, are present on viually all nucleated cells. Mature human red blood cells are not nucleated and do not generally have easily detectable HLA antigens, Reff: www.mayoclinin.com