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: Surgery
[{'content': "Ankle brachial index is useful in prediction of: \nSelect and explain. \nA. Myocardial infarction, B. Buerger's disease, C. Meconium ileus, D. All of the above", 'role': 'user'}, {'content': "Answer: A \nExplanation: There is increasing interest in the use of the ankle-brachial index (ABI) to evaluate patients at risk for cardiovascular events. An ABI Ref: Schwaz's principle of surgery 9th edition, chapter 23.", 'role': 'assistant'}]