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: Medicine
[{'content': 'Which one of the following is of highest predictive value in the morbidity of coronary heart disease \nSelect and explain. \nA. Lipoprotein A, B. Apolipoprotein B, C. Apolipoprotein A, D. Low density lipoprotein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]