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Which one of the following air pollutants combines with the hemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death?
1) Chlorofluorocarbon
2) Fly ash
3) Carbon monoxide
4) Sulphur dioxide
Carboxyhaemoglobin or carboxyhaemoglobin (symbol COHb or HbCO) is a complex of carbon monoxide and haemoglobin (Hb) that forms in red blood cells upon contact with carbon monoxide.
Carbon Monoxide inhibits body stability to distribute O2.
Haemoglobin has a higher affinity for CO.
Haemoglobin that binds CO becomes ‘poisoned’ and can no longer bind oxygen, destroying its function.
3) Carbon monoxide