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 middle cardiac vein is located at the - \nSelect and explain. \nA. Anterior interventricular sulcus, B. Posterior interventricular sulcus, C. Posterior AV groove, D. Anterior AV groove', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In Coronary sulcus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Great cardiac vein, small cardiac vein, coronary sinus, right coronary artery, left circumflex artery\n\xa0In anterior interventricular sulcus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Great cardiac vein, left anterior descending artery\n\xa0In posterior interventricular sulcus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Middle cardiac vein, posterior interventricular branch of right coronary artery', 'role': 'assistant'}]