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
Apolipoprotein A-I (Apo A-I) is found in which of the following lipid components? 
Select and explain. 
A. LDL, B. HDL, C. VLDL, D. Chylomicron
B: HDL
Answer: B: HDL 
Explanation: About Apo A Apo A-I is impoant component of HDL. ApoA is the activator of LCAT which is impoant enzyme for reverse cholesterol transpo, conveing cholesterol to cholesterol ester. Intestinal cells produce small qualntities of Apo A Apo A-I is a ligand for HDL receptor Apo A-I is anti-aherogenic. Ref: Textbook of Biochemistry for Medical Students by D.M. Vasudevan, 6th Edition, Page: 152