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
What is the sequence of gastric emptying? 
Select and explain. 
A. Fat > protein > carbohydrate, B. Fat > carbohydrate > protein, C. Protein > fat > carbohydrate, D. Equal for all three substances
A: Fat > protein > carbohydrate
Answer: A: Fat > protein > carbohydrate 
Explanation: Gastric emptying is fastest for food rich in carbohydrates, slow for protein-rich diet and is slowest for fat rich food Ref: Ganong 25th ed/page 502