This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Most radiosensitive cells among the following is: \nSelect and explain. \nA. Cells of hemopoietic series, B. Cells of erythroblastic series, C. Fibroblast, D. Erythrocytes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]