Choose the correct option:
$(1)$ On an average,a healthy human breathes ...$X$... times/minute.
$(2)$ Every $100 \, ml$ of oxygenated blood can deliver around ...$Y$... of $O_2$ to the tissues under normal physiological conditions.
$X-Y$

$I.$ $pO_2$ is the major factor which affects the binding of $CO_2$ with haemoglobin.
$II.$ $pCO_2$ is low and $pO_2$ is high in tissues.
$III.$ $RBC$ contains a very high concentration of carbonic anhydrase.
$IV.$ Every $100 \; mL$ of deoxygenated blood delivers approximately $4 \; mL$ of $CO_2$ to alveoli.
Select the combination of right statements.

Which physiological adaptation occurs in people living at high altitudes to survive in low atmospheric pressure?

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

Which of the following are the correct statements regarding respiration in humans?

When the external temperature is higher than our body temperature, we regulate it by $........$, and when it is lower than our body temperature, we regulate it by $........$.