A 28-Year-Old Man Is Found Unresponsive by His Roommate and Is

A 28-year-old man is found unresponsive by his roommate and is brought to the emergency department.  He has a history of injection drug use.  On physical examination, the patient is obtunded and hypopneic.  The pupils are pinpoint.  Lung auscultation reveals decreased breath sounds bilaterally.  Endotracheal intubation is planned for airway protection and arterial blood gas analysis is performed prior to the procedure while the patient is breathing room air.  This patient's current acid-base status is best represented by which of the following points on the below graph?

A) A
B) B
C) C
D) D
E) E

Correct Answer:

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