This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
Main lipid component of LDL 
Select and explain. 
A. Triacylglycerol, B. Cholesterol, C. Phospholipids, D. Free fatty acids
B: Cholesterol
Answer: B: Cholesterol 
Explanation: LipoproteinSourceDiameter (nm)Density (g/ml)Main lipid ComponentApolipoproteinsLDLVLDL20-251.019-1.063CholesterolB-100Ref: Harper&;s biochemistry; 30th edition; Chapter 25; Lipid Transpo & Storage