Answer:
The answer is Glycosylated hemoglobin.
Explanation:
The test that best reflects blood sugar levels over a period of 3 to 4 months is glycosylated hemoglobin. This glycosylated hemoglobin (HbA1c) test is a blood test for type 2 diabetes and prediabetes. It is a test that will measure the average level of glucose or blood sugar during the last three months. Diabetes program managers and doctors can use the HbA1c test alone or in combination with other diabetes tests to make a diagnosis.