This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'At what stage of erythropoiesis does Hemoglobin appear? \nSelect and explain. \nA. Reticulocyte, B. Intermediate normobalst, C. Early normoblast, D. Erythroblast', 'role': 'user'}, {'content': 'Answer: B \nExplanation: a pronormoblast, also commonly called an proerythroblast or a rubriblast. This becomes a basophilic or early normoblast, also commonly called an erythroblast, then. a polychromatophilic or intermediate normoblast, then. an ohochromatic or late normoblast. At this stage the nucleus is expelled before the cell becomes. Ref: guyton and hall textbook of medical physiology 12 edition page number: 111,112,113', 'role': 'assistant'}]