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': "Koch's triangle has blood supply from - \nSelect and explain. \nA. Right coronary artery, B. Left circumflex artery, C. Left anterior descending artery, D. Anterior aortic sinus", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Koch’s triangle is a part of right atrium. Hence it is supplied by Right coronary artery.', 'role': 'assistant'}]