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: Psychiatry
Polysomnography contains all of the following tests except: 
Select and explain. 
A. Electroencephalography, B. Pulse oximetry, C. Electrooculography, D. Aerial pCO2 measurement
D: Aerial pCO2 measurement
Answer: D: Aerial pCO2 measurement 
Explanation: Ans: D. Aerial pCO2 measurement(Ref Kaplan & Sadock 11/e p264. 535)Polysomnography:Used to assess disorders of sleep by concurrently assessing the EEG, ECG, blood oxygen saturation, respirations, body temperature, electromyogram & electro-oculogram.Does not use aerial pCO2 measurement.