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': 'Cholesterol levels in abnormal person should be preferably less than \nSelect and explain. \nA. 200 mg/dl, B. 180 mg/dl, C. 150 mg/dl, D. 120 mg/dl', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]