First cell of RBC development:: (A) Proerythroblast, (B) Intermediate normoblast, (C) Reticulocyte, (D) Basophilic erythroblast
Answer is A. a. Proerythroblast(Ref: Nelson's 20/e p 2304-2308, Ghai 8/e p 330)Stage of RBC development are: Proerythroblast - Basophillic - polychromatic - Orthochromatic erythroblast - Nucleated RBC - Reticulocyte - Mature RBC.