Question

Oxygen carrying capacity of blood is?

• A. $20\%$
• B. $30\%$
• C. $40\%$
• D. $50\%$

Answer 1

The correct option is A $20\%$

• Oxygen carrying capacity of blood refers to the amount of oxygen transported by blood. Normal hemoglobin content in blood is 15 g%.
  
• Since oxygen carrying capacity of hemoglobin is 1.34 ml/g, blood with 15 g% of hemoglobin should carry 20.1 mL% of oxygen, i.e. 20.1 mL of oxygen in 100 mL of blood.
  
• But, blood with 15 g% of hemoglobin carries only 20 mL% of oxygen, i.e. 20 mL of oxygen is carried by 100 mL of blood. Oxygen carrying capacity of

blood is only 20 mL% because the hemoglobin is not fully saturated with oxygen. It is saturated only for about 95%.

So, the correct option is '20%'.