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
[{'content': 'The Vessel (With Arrow) Shown in the diagram is a branch of: \nSelect and explain. \nA. Left Coronary aery, B. Coronary Sinus, C. Pulmonary aery, D. Right Coronary aery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Left Coronary aery', 'role': 'assistant'}]