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: Social & Preventive Medicine
[{'content': 'Corn flakes is classified as which grade of glycemic index: \nSelect and explain. \nA. Very low, B. Low, C. High, D. Medium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: classification GI range Example Low GI 55 or less Most fruits and vegetables except potatoes and water melon, pasta beans, lentils Medium GI 56-69 Sucrose, brown rice, basmati rice High GI 70 or more Corn flakes, white bread, candy bar Ref: Park 22nd edition, page 568', 'role': 'assistant'}]