Q. Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct?

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Solution:

Carbon monoxide forms a stable compound with haemoglobin called carboxyhaemoglobin as affinity of haemoglobin for carbon monoxide is 250 times greater than its affinity for oxygen. In this form, haemoglobin does not carry oxygen resulting in death too.
Hb + CO Hb CO
Haemoglobin → Carboxyhaemoglobin