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
At what stage of erythropoiesis does Hemoglobin appear 
Select and explain. 
A. Reticulocyte, B. Intermedate normoblast, C. Early normoblast., D. Erythroblast
B: Intermedate normoblast
Answer: B: Intermedate normoblast 
Explanation: Hb synthesis stas at the stage of intermediate normoblast and then its contents increase progressivelyRef: Medical Physiology Indu Khurana 2015 edition page No:106