Central cyanosis is associated with
a. visible cyanosis but normal arterial oxygen saturation.
b. desaturation of arterial blood.
c. reduced hemoglobin of 15 g/dL.
d. permanent cerebral hypoxia.
B
Cyanosis is visible when hemoglobin is reduced by 5 g per 100 mL of blood. Cyanosis associated with desaturation of arterial blood is called central cyanosis. Peripheral cyanosis is a condition in which cyanosis exists but the child has a normal arterial oxygen saturation.
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