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
Ligand for LDL 
Select and explain. 
A. APO B 100, B. APO E, C. APO 48, D. APO A11
A: APO B 100
Answer: A: APO B 100 
Explanation: LOW-DENSITY LIPOPROTEINS (LDL) LDL transpos cholesterol from liver to peripheral tissues. The only apoprotein present in LDL is apo B100. Most of the LDL paicles are derived from VLDL, but a small pa is directly released from liver. The half-life of LDL in blood is about 2 days.Ref: DM Vasudevan - Textbook of Biochemistry, 8th edition, page no: 153