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': 'In systemic circulation, 2/3rd of resistance to the flow of Blood is offered by \nSelect and explain. \nA. Small arteries, B. Arterioles, C. Capillaries, D. Venules', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]