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: Medicine
[{'content': 'HbA1c control for how much time \nSelect and explain. \nA. 2 -3 weeks, B. 3 - 6 weeks, C. 6 - 8 weeks, D. 14 - 18 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. 6 - 8 weeksThe half-life of an erythrocyte is typically 60 days, the level of glycated hemoglobin (HbA1c) reflects the mean blood glucose concentration over the preceding 6-8 weeks.', 'role': 'assistant'}]