Carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body due to:

Destruction of haemoglobin

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Formation of clots

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Forming stable compound with haemoglobin

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Combining with oxygen to form carbon dioxide

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Solution

The correct option is C
Forming stable compound with haemoglobin

Carbon monoxide combines with hemoglobin present in blood to form a compound called carboxyhemoglobin. Carbon monoxide has a very high affinity for hemoglobin and it decreases the amount of oxyhemoglobin formed and hence causing suffocation.

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