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: Anaesthesia
[{'content': 'For central venous pressure monitoring all are true except \nSelect and explain. \nA. Internal jugular vein is preferred site, B. Indicated to administer hyperosmolar drugs, C. Pulmonary capillary wedge pressure normally is 10-20 mmHg, D. Swan- ganz catheter entering pulmonary artery shows as dicrotic notch.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pulmonary capillary wedge pressure in 4-12 mmHg normally.', 'role': 'assistant'}]