The following are the parts of human respiratory system 

I	Glottis	II	Trachea
III	External nostrils	IV	Larynx
V	Nasal chambers	VI	Bronchi
VII	Alveolar ducts	VIII	Bronchioles

Arrange them in correct sequence through which inhaled air reaches the alveoli

Select the correct events that occur during inspiration.

(a) Contraction of diaphragm
(b) Contraction of external intercostal muscles
(c) Pulmonary volume decreases
(d) Intrapulmonary pressure increases

Match the type of cells in Column $\mathrm{I}$ with the organs they are part of, listed in Column $\mathrm{II}:$

Choose the CORRECT combination.

Assertion ($\mathrm{A}$): Biconcave shape of mammalian $\mathrm{RBC}$ facilitates gas exchange.

Reason ($\mathrm{R}$): Biconcave shape provides a high surface to volume ratio.