This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Which of the following has highest glycemic index? 
Select and explain. 
A. Com flakes, B. White-rice, C. Ice cream, D. Whole wheat bread
A: Com flakes
Answer: A: Com flakes 
Explanation: Glycemic index is defined as numerical index given to a carbohydrate-rich food that is based on the average increase in blood glucose levels occurring after the food is eaten.Ref: Ganong&;s review of medical physiology;24th edition; page no-478