Which one of the following air pollutants combines with the haemoglobin of human blood and reduces its oxygen- carrying capacity, leading to suffocation and may cause even death?

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Q: 5 (CDS-II/2016)

Which one of the following air pollutants combines with the haemoglobin of human blood and reduces its oxygen- carrying capacity, leading to suffocation and may cause even death?

question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,41,46,9,5,69,4

keywords: 

{'air pollutants': [0, 0, 0, 2], 'carbon monoxide': [3, 0, 1, 1], 'chlorofluorocarbon': [1, 0, 0, 6], 'haemoglobin': [10, 1, 0, 2], 'sulphur dioxide': [0, 0, 0, 1], 'human blood': [1, 0, 0, 1], 'fly ash': [0, 0, 0, 1], 'suffocation': [0, 0, 0, 1], 'death': [5, 3, 6, 7]}

Option 1: Chlorofluorocarbon (CFC) is a type of air pollutant that is primarily responsible for ozone depletion. It does not directly affect the oxygen-carrying capacity of hemoglobin in human blood, leading to suffocation or death. Therefore, option 1 is not the correct answer.

Option 2: Fly ash is a fine powder that is produced as a byproduct of burning coal in power plants. While it is an air pollutant and can have various negative health effects, it does not directly combine with hemoglobin in human blood. It does not lead to suffocation or reduced oxygen-carrying capacity. Hence, option 2 is not the correct answer.

Option 3: Carbon monoxide (CO) is the correct answer. Carbon monoxide is a poisonous gas that is produced by the incomplete combustion of fossil fuels such as gasoline, coal, and wood. When inhaled, it combines with hemoglobin in the blood, forming carboxyhemoglobin. This reduces the blood`s ability to transport oxygen to the body`s tissues, leading to suffocation and potentially fatal consequences. Therefore, option 3 is the correct answer.

Option 4: Sulphur dioxide (SO2) is a harmful gas that is primarily

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