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
Long term control of diabetes is assessed by 
Select and explain. 
A. Random blood sugar, B. Microalbuminuria/ creatinine ratio, C. HbA2, D. HbA1c
D: HbA1c
Answer: D: HbA1c 
Explanation: Ans. D i.e. HbA1c