About 70% of $C O_{2}$ in blood is transported in the form of

dissolved

C O_{2}

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bicarbonates

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carbaminohaemoglobin

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carboxyhaemoglobin

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Solution

The correct option is B bicarbonates
About 70% of $C O_{2}$ received by blood from the tissues, enters the RBCSs where it reacts with water to form carbonic acid. Almost as rapidly as formed all carbonic acid of RBCs dissociates into hydrogen and bicarbonate ions. The most of bicarbonate ions formed within RBCs diffuse out into the blood plasma along a concentration gradient.

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