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': 'Regarding the peak expiratory flow rate, all are true except \nSelect and explain. \nA. In normal adults is often more than 500L/min, B. Can be measured by a pneumotachograph, C. Increases with age, D. Can be measured by the wright’s peak flow meter', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PEFR declines with age.', 'role': 'assistant'}]