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: Medicine
[{'content': 'Which of the following about atherosclerosis is true ? \nSelect and explain. \nA. Intake of unsaturated fatty acid associated with decreased risk, B. Thoracic aorta involvement is more severe than abdominal aorta involvement, C. Extent of lesion in veins is same as that in arteries, D. Hypercholesterolemia does not always increase the risk of atherosclerosis per se', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]