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
[{'content': 'Fatty acids of cholesterol are mainly \nSelect and explain. \nA. Oleic acid, B. Linoleic acid, C. Palmitic acid, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Oleic acid\n\nThe various fatty acids which form cholesterol\xa0esters are as follows: Linoleic acid (50%), oleic acid (18%), palmitic acid (11%), Arachidonic acid (5%), and other fatty acids.', 'role': 'assistant'}]