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 normal level of serum cholesterol is: \nSelect and explain. \nA. 100-140 mgs/100 ml, B. 260-360 mgs/100 ml, C. 150-250 mgs/100 ml, D. 80-120 mgs/ml', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]