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': 'Which of the following is called as capacitance vessels \nSelect and explain. \nA. Artery, B. Arteriole, C. Veins, D. Venule', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A large amount of blood can be added to the venous system before the veins become distended to the point where further increments in volume produce a large rise in venous pressure. The veins are therefore called capacitance vessels.', 'role': 'assistant'}]