This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Functional Anatomy - Respiratory System, Subject name: Physiology
[{'content': 'Lung capillary volume is - \nSelect and explain. \nA. 50 ml, B. 150 ml, C. 300 ml, D. 500 ml', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 150 ml o Total capillary blood valume in lung- 104 ml.o Total pulmonary capillary surface area - 70 m2o Volume of blood per alveolus - 4.7 x 10-7 ml.o Capillary surface area per alveolus - 23.4 x l04 cm2o Number of capillary segments - 280 x 109", 'role': 'assistant'}]