In high-altitude regions,the $R.B.C.$ count in humans will . . . . . . .

Given below are two statements.
Statement $I$: Guard cells of stomata are kidney shaped in dicotyledons and dumbbell shaped in monocotyledons.
Statement $II$: In $Cyperus$,both kidney and dumbbell shaped guard cells are present.
In the light of above statements,choose the most appropriate answer from the options given below:

Persons living at high altitude will have

Match the following columns and select the correct option:

Column $I$	Column $II$
$(a)$ Pneumotaxic Centre	$(i)$ Alveoli
$(b)$ $O_{2}$ Dissociation curve	$(ii)$ Pons region of brain
$(c)$ Carbonic Anhydrase	$(iii)$ Haemoglobin
$(d)$ Primary site of exchange of gases	$(iv)$ $R.B.C.$

What is the last step involved in respiration?

For completion of the respiration process,write the given steps in sequential manner.
$(a)$ Diffusion of gases ($O_2$ and $CO_2$) across alveolar membrane.
$(b)$ Transport of gases by blood.
$(c)$ Utilisation of $O_2$ by the cells for catabolic reactions and resultant release of $CO_2$.
$(d)$ Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ rich alveolar air is released out.
$(e)$ Diffusion of $O_2$ and $CO_2$ between blood and tissues.