<prompt> 1st stage of RBC development is?ErythroblastIntermediate normoblastLate normoblastReticulocyte  <response>: Stages of RBC development: Proerythroblast - Early normoblast Basophilic erythroblast - Intermediate normoblast Polychromatophilic erythroblast - Late normoblast Ohochromatic erythroblast - Reticulocyte - Mature red cell EXTRA EDGE: - Hb can be 1st detected in proerythroblast - only by electron microscope - Hb can be 1st detected by routine staining in Intermediate Normoblast - 1st Non-nucleated cell seen in RBC development - Reticulocyte 