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': 'Hypolipidemic agents act on \nSelect and explain. \nA. HMG CoA synthetase, B. HMG CoA oxygenase, C. HMG CoA reductase, D. HMG CoA hydratase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: HMG CoA reductase\xa0\nHypolipidemic drugs (statins) inhibit HMG-CoA reductase', 'role': 'assistant'}]