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
One of the following is a scavenger of cholesterol from tissue and prevents atherosclerosis - 
Select and explain. 
A. VLDL, B. LDL, C. Chylomicrons, D. HDL
D: HDL
Answer: D: HDL 
Explanation: HDL

The HDL particles are referred to as scavengers because their primary role is to remove free (unesterified) cholesterol from the extrahepatic tissues.
HDL particles transport cholesterol from extrahepatic tissues to liver (i.e. reverse cholesterol transport) which is then excreted through bile.