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
Measurement of Hb1AC is required for? 
Select and explain. 
A. Screening of controlled diabetes, B. Monitoring of diabetes, C. Screening of uncontrolled diabetes, D. Confirmation of diabetes
B: Monitoring of diabetes
Answer: B: Monitoring of diabetes 
Explanation: None