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: Anatomy
All of the following arteries are common sites of occlusion by a thrombus except - 
Select and explain. 
A. Anterior interventricular, B. Posterior interventricular, C. Cirucumflex, D. Marginal
D: Marginal
Answer: D: Marginal 
Explanation: Thrombus is not common in marginal artery.