This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Pediatrics
Most confirmatory sign of endotracheal intubation is? 
Select and explain. 
A. Chest rise, B. Auscultation, C. Spirometry, D. Capnography
D: Capnography
Answer: D: Capnography 
Explanation: d. Capnography(Ref: AAP guidelines 2015, Ghai 8/e p 126-133)Exhaled CO2 detection or Capnography is the recommended or confirmatory method to assess position of Endotracheal tubeOther methods are: bilateral chest movements, presence of equal breath sounds bilaterally, condensation in endotracheal tube.