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
Regarding the peak expiratory flow rate, all are true except 
Select and explain. 
A. 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
C: Increases with age
Answer: C: Increases with age 
Explanation: PEFR declines with age.