This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipoproteins, Subject name: Biochemistry
[{'content': 'The source of apo-E and apo C-II for the chylomicrons is: \nSelect and explain. \nA. VLDL, B. IDL, C. LDL, D. HDL', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Newly secreted or "nascent" chylomicrons and ApoB-48 apolipoprotein. HDL acts as a reservoir of lipoproteins and provide ApoE and ApoC to nascent chylomicrons to form mature chylomicrons.', 'role': 'assistant'}]