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 statements is true about capillaries \nSelect and explain. \nA. Contains 5% of total blood volume, B. Contain 10% of total blood volume, C. Velocity of blood flow is maximum, D. Offer maximum resistance to blood flow', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Capillaries contain 5% of the blood volume.', 'role': 'assistant'}]