This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Which of the following is the most abundant diet of animal origin? \nSelect and explain. \nA. Phospholipids, B. Cholesterol esters, C. Cholesterol, D. Triglycerides', 'role': 'user'}, {'content': "Answer: D \nExplanation: The triacylglycerols are esters of the trihydric alcohol glycerol and fatty acids and are available abundantly in animal diet Ref: Harper's Biochemistry; 30th edition; Chapter 21; Lipids of Physiologic Significance", 'role': 'assistant'}]