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
All of the following aeries are common sites of occlusion by a except: 
Select and explain. 
A. Left anterior descending, B. Right coronary aery, C. Circumflex coronary aery, D. Marginal aery
D: Marginal aery
Answer: D: Marginal aery 
Explanation: Answer is D (Marginal aery)