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Question

Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhaling polluted air containing unusually high content of

A
carbon disulphide
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B
chloroform
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C
carbon dioxide
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D
carbon monoxide.
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Solution

The correct option is D carbon monoxide.
Carbon monoxide combines with Hb far more readily than O2 (CO has about 200 times greater affinity for Hb as compared to O2), forming a relatively stable compound carboxyhaemoglobin. This causes low supply of O2 to the body cells leading to headache, nausea, dizziness, paralysis and even death.

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