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: Biochemistry
Typical lipoprotein contains 
Select and explain. 
A. Free cholesterol + Phospholipid at periphery, B. Cholesteryl ester + FA at center, C. Proteins as apoproteins, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None