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': 'Long term control of diabetes is assessed by \nSelect and explain. \nA. Random blood sugar, B. Microalbuminuria/ creatinine ratio, C. HbA2, D. HbA1c', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. HbA1c', 'role': 'assistant'}]