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
Which is the ligand for receptors present in liver for uptake of LDL? 
Select and explain. 
A. Apo B-100, B. Apo B-48, C. Apo E and Apo B-100, D. Apo A-I
A: Apo B-100
Answer: A: Apo B-100 
Explanation: None