This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'At what stage of erythropoiesis does Hemoglobin appear \nSelect and explain. \nA. Reticulocyte, B. Intermedate normoblast, C. Early normoblast., D. Erythroblast', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hb synthesis stas at the stage of intermediate normoblast and then its contents increase progressivelyRef: Medical Physiology Indu Khurana 2015 edition page No:106', 'role': 'assistant'}]