Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: During the transportation of…

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: During the transportation of gases, about $\displaystyle 20$-$\displaystyle 25$ percent of $\displaystyle \mathrm{CO}_2$ is carried by Haemoglobin as carbamino-haemoglobin. Reason R: This binding is related to high $\displaystyle \mathrm{pCO}_2$ and low $\displaystyle \mathrm{pO}_2$ in tissues. In the light of the above statements, choose the correct answer from the options given below.