This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Glycosylated hemoglobin reflects the mean blood glucose level of previous \nSelect and explain. \nA. 15days, B. 1 month, C. 3 months, D. 6 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: HBA1c :There should be an estimation of glycosylated haemoglobin at half yearly intervals. This test provides a long-term index of glucose control. This test provides a long-term index of glucose control. This test is based on the following rationale: glucose in the blood is complexed to a ceain fraction of haemoglobin to an extent propoional to the blood glucose concentration. The percentage of such glycosylated haemoglobin reflects the mean blood glucose levels during the red cell lifetime ( about the previous 2-3months ).Ref: Park; 23rd ed; Pg 396', 'role': 'assistant'}]