This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
[{'content': 'The apoprotein associated with LCAT is \nSelect and explain. \nA. Apo A, B. Apo B, C. Apo C, D. Apo E', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lecithin: cholesterol acyltransferase (LCAT) activity is associated with HDL containing apo A-I. As cholesterol in HDL becomes esterified, it creates a concentration gradient and draws in cholesterol from tissues and from other lipoproteins, thus enabling HDL to function in reverse cholesterol transpo. Reference: Harper; 30th edition; Page no: 272', 'role': 'assistant'}]