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. Contain 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: A i.e. Contains 5% of blood volume', 'role': 'assistant'}]