Daily respiratory activities are controlled by

$A$: Pneumotaxic centre controls the rate of respiration.
$R$: Primarily,it controls the switch-off point of inspiration.

Which of the following changes usually tends to occur in plain dwellers when they move to high altitudes?
$I.$ Increased breathing rate
$II.$ Increased $RBC$ production
$III.$ Increased $WBC$ production
$IV.$ Increased thrombocyte count
Choose the correct option.

Give the function of the pneumotaxic centre.

Where is the respiratory rhythm center located?

Select the correct option with respect to the $Hering-Breuer$ reflex.