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': 'The normal myeloid erythroid ratio is - \nSelect and explain. \nA. 2:01, B. 1:01, C. 3:01, D. 4:01', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]