What is the most common complication of diabetes mellitus?

Correct option is B

Hyperglycemia (high blood sugar) is the most common complication of diabetes mellitus. If left uncontrolled, it can lead to diabetic ketoacidosis (DKA), kidney failure, nerve damage, and cardiovascular diseases. Chronic hyperglycemia is responsible for most long-term complications in diabetic patients.
Explanation of Options:
· (a) Galactosemia: A genetic disorder unrelated to diabetes.
· (b) Hyperglycemia: Correct answer; the primary complication of diabetes if blood sugar levels are not controlled.
· (c) Hypoglycemia: Low blood sugar, but more commonly caused by diabetes medications rather than the disease itself.
· (d) Stroke: A possible complication of diabetes, but not the most common.