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': 'Glycemic control over the previous 6-8 weeks in patients with diabetes mellitus is best assessed by estimation of \nSelect and explain. \nA. Fasting blood glucose, B. Glycated hemoglobin, C. Fasting C peptide, D. Fasting plasma insulin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]