A) \[S{{O}_{2}}\]
B) \[~{{O}_{3}}\]
C) \[CO\]
D) \[C{{O}_{2}}\]
Correct Answer: C
Solution :
Carbon monoxide has 200 times more affinity for haemoglobin than oxygen. On combining with haemoglobin, it forms a stable compound called carboxyhaemoglobin which is poisonous in nature and thus decreasing the oxygen carrying capacity of haemoglobin. About 23% of total blood \[C{{O}_{2}}\] is transported by loosely binding with haemoglobin forming a unstable compound called carbamino haemoglobin.
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