Question

Mouth to mouth respiration provides what percentage of oxygen ?

• A. 10%
• B. 16%
• C. 21%
• D. 100%

Answer 1

The Correct Option is B

Mouth-to-mouth respiration is a technique used to provide oxygen directly to someone who is not breathing properly. When a person breathes out, the exhaled air contains approximately 16% oxygen. This is because the human body uses some oxygen for metabolic processes and expels air with less oxygen. Therefore, during mouth-to-mouth resuscitation, the exhaled air provides approximately 16% oxygen to the recipient, which is enough to sustain life in an emergency situation until more advanced medical help can be provided.

Method	Oxygen Percentage
Ambient Air	21%
Exhaled Breath (Mouth-to-Mouth)	16%

Thus, the correct answer to the question is 16%.