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: Physiology
[{'content': 'Greatest resistance in peripheral blood circulation is due to: \nSelect and explain. \nA. Aeries, B. Aerioles, C. Veins, D. Capillaries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aerioles', 'role': 'assistant'}]