This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Regulation of blood flow is maintained by \nSelect and explain. \nA. Aeries, B. Venules, C. Capillaries, D. Aerioles', 'role': 'user'}, {'content': "Answer: D \nExplanation: (Refer: Ganong's Review of Medical Physiology 24thedition, pg no: 570-572, 577)", 'role': 'assistant'}]