Which of the following conditions is an example of hypoxemia with cyanosis?

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Cyanosis does not always accompany severe hypoxemia, and cyanosis is sometimes present even in the absence of hypoxemia. If anemia is severe enough, the total hemoglobin concentration may be so low that even severe hypoxemia does not produce the 5 g/dL of desaturated hemoglobin necessary to cause cyanosis. Conversely, people with abnormally high hemoglobin concentrations (polycythemia) may appear to be cyanotic because their capillary blood contains 5 g/dL of desaturated hemoglobin, and yet the remaining quantity of saturated hemoglobin is high enough that the oxygen content is normal. Carbon monoxide inhalation is another example of hypoxemia without cyanosis; CO creates hypoxemia by aggressively binding to the hemoglobin molecule, blocking oxygen's binding sites. Hemoglobin combined with CO is bright red; therefore, although the blood's oxygen content is very low it is not cyanotic.

Which of the Following Conditions Is an Example of Hypoxemia