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: Social & Preventive Medicine
[{'content': 'Clinical GOAl recommended by WHO for Prevention of CAD is \nSelect and explain. \nA. Cholesterol / LDL ratio, B. Cholesterol / HDL ratio, C. Triglycerides / LDL ratio, D. Triglycerides / HDL ratio', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]