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 arteries are common sites of occlusion by a except - 
Select and explain. 
A. Left anterior descending, B. Right coronary artery, C. Circumflex coronary artery, D. Marginal artery
D: Marginal artery
Answer: D: Marginal artery 
Explanation: None