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B
Sodium carbonate
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C
Magnesium carbonate
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D
None of the above
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Solution
The correct option is A Carboxy hemoglobin Carbon dioxide molecules are transported through the blood from tissues to the lungs either by direct dissolution into the blood, bounded to hemoglobin, or carried as a bicarbonate. When carbon dioxide binds to hemoglobin, a molecule of carbamino hemoglobin is formed.