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: Biochemistry
Glycemic index is defined as: 
Select and explain. 
A. Glucose control in last 3 months, B. Measure of the change in the blood glucose following ingestion of proteins, C. Measure of the change in the blood glucose following ingestion of carbohydrate, D. Measure of the change in the blood glucose following ingestion of fats.
C: Measure of the change in the blood glucose following ingestion of carbohydrate
Answer: C: Measure of the change in the blood glucose following ingestion of carbohydrate 
Explanation: The Glycemic index (GI) of a carbohydrate containing food is a measure of the change in the blood glucose following its ingestion