Select the INCORRECT statements.

i. The rate of formation of $\mathrm{H}_2 \mathrm{CO}_3$ is slower in RBCs and faster in plasma.

ii. Dissociation of $\mathrm{H}_2 \mathrm{CO}_3$ into $\mathrm{H}^{+}$and $\mathrm{HCO}_3^{-}$ takes place due to carbonic anhydrase.

iii. The carbonic anhydrase is present in leucocytes,

iv. The prosthetic group of carbonic anhydrase is Mn .

Select the correct option.

Match the Column I and II

Choose the correct option:

Due to formation of oxyhaemoglobin, the pH of blood decreases due to release of $\mathrm{H}^{+}$ion and the $\mathrm{H}_2 \mathrm{CO}_3$ dissociates into $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{CO}_2$. This is called __________ .

How does the Hb act as buffer?