High percentage of CO2 and very low percentage of O2 may make a person unconscious due to.
A
Eupnoea
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B
Emphysema
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C
Suffocation
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D
Asphyxia
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Solution
The correct option is D Asphyxia Asphyxia is the extreme condition caused by lack of oxygen and excess of carbon dioxide in the blood, produced by interference with respiration or insufficient oxygen in the air; suffocation. Asphyxia is also caused by an injury or obstruction of airway passages. It may lead to fainting and death.