Carbonic anhydrase is found in .......... .

Left shift of the oxyhaemoglobin dissociation curve is noticed under:

Each haemoglobin molecule can carry a maximum of

$A$ large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This $O_2$

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.

What percentage of $O_2$ is transported by hemoglobin (in $\%$)?