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: Physiology
[{'content': 'Normal myeloid/erythroid ratio is: \nSelect and explain. \nA. 0.736111111, B. 3.513888889, C. 0.111111111, D. 1:50', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]