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
[{'content': 'A 49-year-old man has his serum lipids measured. Which pattern suggests the lowest risk for CAD? \nSelect and explain. \nA. total cholesterol 215 mg/dL, high-density lipoprotein (HDL) cholesterol 28 mg/dL, B. total cholesterol 215 mg/dL, HDL cholesterol 43 mg/dL, C. total cholesterol 180 mg/dL, HDL cholesterol 29 mg/dL, D. total cholesterol 202 mg/dL, HDL cholesterol 45 mg/dL', 'role': 'user'}, {'content': 'Answer: D \nExplanation: This combination, although the total cholesterol is borderline, has high HDL cholesterol, which is protective. Nevertheless, a level this high would likely require treatment.', 'role': 'assistant'}]