This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The major venous return of the hea, the coronary sinus, empties into \nSelect and explain. \nA. IVC, B. Left atrium, C. Right atrium, D. Right ventricle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The coronary sinus empties directly into the right atrium (like IVC, SVC) near the conjunction of the posterior interventricular sulcus and the coronary sulcus.Reference: Chaurasia; 6th edition', 'role': 'assistant'}]