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': 'All of the following aeries are common sites of occlusion by a except: \nSelect and explain. \nA. Left anterior descending, B. Right coronary aery, C. Circumflex coronary aery, D. Marginal aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Marginal aery)', 'role': 'assistant'}]