This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
[{'content': 'Normal capillary wedge pressure \nSelect and explain. \nA. 0-2 mm Hg, B. 5-10 mm Hg, C. 15-20 mm Hg, D. 20-30 mm Hg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) 5-10mmHgRef: Ganong, 25th ed/p.574Mean Pulmonary capillary wedge pressure (PCWP)=9mmHg (Range - 4 to 12 mm Hg)PCWP is usually measured using a balloon-tipped, multilumen catheter called Swan-Ganz catheter', 'role': 'assistant'}]