This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Cholesterol level for prevention of coronary aery disease- 
Select and explain. 
A. < 250 mg\/dl, B. < 220 mg\/dl, C. < 300 mg\/dl, D. < 200 mg\/dl
D: < 200 mg\/dl
Answer: D: < 200 mg\/dl 
Explanation: to prevent CAD the cholesterol levels must be below 200 mg per dl