This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute coronary syndrome, Subject name: Medicine
[{'content': 'Which of the following aery is most common to undergo atherosclerotic changes leading to coronary aery disease ? \nSelect and explain. \nA. Right coronary aery, B. Left anterior descending coronary aery, C. Left circumflex coronary aery, D. Left main coronary aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Left anterior descending coronary aery(40-50%) is most commonly involved in CAD, followed by Right coronary aery (30-40%)then Left Circumflex coronary aery (15-20%).', 'role': 'assistant'}]