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: Dental
The only reliable method for determining the mode of respiratory function is: 
Select and explain. 
A. Butterfly test, B. Water test, C. Induction rhinomanometry, D. Halometer
C: Induction rhinomanometry
Answer: C: Induction rhinomanometry 
Explanation: Induction rhinomanometry or plethysmography is considered as gold standard for determining the mode of respiration in any given individual.