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: Social & Preventive Medicine
Glycosylated haemoglobin reflects the mean blood glucose level of previous 
Select and explain. 
A. 15 days, B. 1 month, C. 3 months, D. 6 months
C: 3 months
Answer: C: 3 months 
Explanation: None