What product obtained on burning fossil fuels can prevent oxygen from binding with haemoglobin?
A
Water
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B
Carbon dioxide
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C
Carbon monoxide
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D
Sulphur
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Solution
The correct option is C
Carbon monoxide
Carbon monoxide, like oxygen, has an affinity for iron-containing molecules. The presence of carboxyhaemoglobin diminishes the oxygen held by the normal haemoglobin, which causes fatal.