This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipids, Subject name: Biochemistry
[{'content': 'Which decreases risk of coronary artery disease? \nSelect and explain. \nA. LDL, B. HDL, C. VLDL, D. IDL', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., HDL* High Density lipoprotein is involved in reverse cholesterol transport.* It collects cholesterol and phospholipids from extrahepatic tissue membranes and reach liver. In other words, it reverses atherosclerotic changes. Hence it is found to be protective against atherosclerosis.", 'role': 'assistant'}]