Carbon monoxide is harmful to human beings as it:

is carcinogenic

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is antagonistic to

C O_{2}

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has higher affinity for haemoglobin as compared to oxygen

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is destructive to

C O_{2}

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Solution

The correct option is C has higher affinity for haemoglobin as compared to oxygen
Carbon monoxide is emitted during the combustion of fossil fuels. It is a poisonous gas because it reduces the amount of hemoglobin required for the transport of oxygen. So this gas is not good for health because of higher affinity for hemoglobin as compared to oxygen.

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