Approximately $97\%$ of $O_2$ is transported by $RBCs$. The remaining $3\%$ is transported by:

Identify the correct statement with reference to transport of respiratory gases by blood?

Oxyhaemoglobin can transport

$A$: Major part of carbon dioxide is transported in the form of sodium bicarbonate.
$R$: $0.3 \; ml$ of carbon dioxide is transported per $100 \; ml$ of blood in dissolved state in plasma of blood.

The binding of oxygen with hemoglobin is primarily related to which of the following?

Given below are two statements.
Statement $I$: Carbonic anhydrase enzyme is found in $RBCs$ and is absent in plasma.
Statement $II$: The rate of formation of carbonic acid is very high inside $RBCs$ than in plasma.
In light of the above statements, select the correct answer from the options given below.