The chloride shift is the movement of Cl^$-$

The figure given below shows a small part of human lung where exchange of gases takes place. In which one of the options given below, the one part, $\mathrm{A},\mathrm{B}$, C or D is correctly identified along with its function

The figure shows a diagrammatic view of human respiratory system with labels $\mathrm{A},\mathrm{B},\mathrm{C}$ and $\mathrm{D}.$ Select the option which gives correct identification and main function and/or characteristic :-

Given figure is showing spirogram of pulmonary volumes and capacities

Which represent expiratory reserve volume :-