This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'Gastric emptying sequence into duodenum \nSelect and explain. \nA. Fat > protein > carbohydrate, B. Fat < carbohydrate < protein, C. Protein < fat < carbohydrate, D. Protein > fat > carbohydrate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Food rich in carbohydrate leaves the stomach in a few hours. Protein-rich foods leave more slowly and emptying is slowest after a meal containing fat. Hyperosmotic contents in duodenum decrease gastric emptying. CCK is also an inhibitor of gastric emptying (Ref: Ganong&;s Review of medical physiology, 23 rd edition, page 473)', 'role': 'assistant'}]