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': 'The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans: \nSelect and explain. \nA. Lecithin cholesterol acyl transferase (LCAT), B. Pyrophospho mevalonate decarboxylase, C. HMG CoA reductase, D. Phospho mevalonate kinase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]