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': 'Which vein is found at the apex of the hea ? \nSelect and explain. \nA. Great cardiac vein, B. Coronary Sinus, C. Anterior cardiac vein, D. Middle cardiac vein', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a'i.e., Great cardiac vein[Rel BDC 4n/e VoI. I p. 251-252; Keith Moore 4e/e p. 136-137; Snell's 9/e p. 1211Great Cardiac Vein:The great cardiac vein (left coronary vein) begins at the apex of hea and ascends along the anterior longitudinal sulcus to the base of ventricle.", 'role': 'assistant'}]