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
The Vessel (With Arrow) Shown in the diagram is a branch of: 
Select and explain. 
A. Left Coronary aery, B. Coronary Sinus, C. Pulmonary aery, D. Right Coronary aery
A: Left Coronary aery
Answer: A: Left Coronary aery 
Explanation: Left Coronary aery