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: Pathology
[{'content': 'In an ablated animal, myeloid series cells are injected. Which of following is seen after incubation period - \nSelect and explain. \nA. RBC, B. Fibroblast, C. T lymphocytes, D. Hematopoietic stem cell', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]