Each haemoglobin molecule has

$CO_{2}$ dissociates from carbaminohemoglobin in the alveoli when:

Haemoglobin is a red-colored,iron-containing pigment present in $RBCs$. $O_2$ binds with it in a reversible manner to form..........

Blood is a medium to transport $O_{2}$ and $CO_{2}$. About ...$A$... per cent of $O_{2}$ is transported by ...$B$... in the blood and the remaining ...$C$... per cent of $O_{2}$ is carried in a dissolved state through the ...$D$...
Select the right options for $A, B, C$ and $D$ to complete the given statement.

$CO_{2}$ is transported in blood combined with haemoglobin as:

Refer to the following statements:
$I$. Carbonic anhydrase is present in the erythrocytes.
$II$. In erythrocytes,the carbon dioxide combines with water and is transported.