If a large number of people are enclosed in a room,then

Match Column-$I$ and Column-$II$ with respect to processes involved in respiration with their explanation:

Column-$I$	Column-$II$
$i$. Cellular respiration	$a$. Exchange of gases $O_2$ and $CO_2$ between blood and tissue cells.
$ii$. Breathing	$b$. Physical process of gaseous exchange between atmospheric air and lungs.
$iii$. Internal respiration	$c$. Gaseous exchange between alveolar air and blood capillaries.
$iv$. External respiration	$d$. Food is oxidized and $ATP$ is generated.

Which of the following plants is able to show rolling of leaf during the middle of the day?

Persons living at high altitude will have

Which of the following statements is correct?

$A$ : The passage starting with the external nostrils up to the terminal bronchiole constitutes the respiratory part.
$R$ : The respiratory part transports the air to the alveoli,clears it from foreign materials,humidifies it,and brings the air to body temperature.