This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'The vein in the cardiac anterior interventricular groove is \nSelect and explain. \nA. Great Cardiac Vein, B. Anterior cardiac vein, C. Posterior cardiac vein, D. Thebesian vein', 'role': 'user'}, {'content': "Answer: A \nExplanation: The Great cardiac vein accompanies first the anterior interventricular aery and then the left coronary aery to enter the left end of the coronary sinus. B D CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 FIFTH EDITION Page no-254", 'role': 'assistant'}]