A 34-year-old woman has had 8 months of heavy menstrual bleeding. She is breathless climbing one flight of stairs and tired all day. Her conjunctivae are pale. Respiratory rate is 14/min, pulse 96/min and blood pressure 112/70 mmHg. The chest is clear and the heart sounds are normal. Haemoglobin is 61 g/L. She is breathing room air.
Which one of the following combinations of arterial oxygen tension, haemoglobin oxygen saturation and arterial oxygen content would you expect in this woman at rest?
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