The partial pressure of end-tidal carbon dioxide (PetCO₂)reading is taken at what point in the figure?

Question

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Point C shows the concentration of carbon dioxide (CO₂)at the end of the alveolar phase,just before inspiration begins.This occurs in phase 3 of the four phases of a capnogram.Point A depicts phase 1,which is the initial gas exhaled from the conducting airways.As a person exhales,the amount of CO₂in the exhaled gas increases.The amount of CO₂ exhaled levels off at point B.This coincides with phase 4 or the alveolar plateau.Point D is showing the fall in CO₂ that occurs during inspiration.

The Partial Pressure of End-Tidal Carbon Dioxide (PetCO2) reading Is

The Partial Pressure of End-Tidal Carbon Dioxide (PetCO₂)reading Is