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': 'Rank the food items in descending order of their energy yield per 100 grams Carbohydrate – A, Fats – B, Alcohol – C \nSelect and explain. \nA. B C A, B. A B C, C. C A B, D. C B A', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]