Read the steps of respiration and arrange them in the correct sequence.
$I$ - Transport of gases by blood.
$II$ - Utilization of $O_2$ by cells for catabolic reactions and release of $CO_2$.
$III$ - Diffusion of gases across the alveolar membrane.
$IV$ - Diffusion of $O_2$ and $CO_2$ between blood and tissues.

• A
  $I \rightarrow III \rightarrow IV \rightarrow II$
• B
  $III \rightarrow I \rightarrow IV \rightarrow II$
• C
  $III \rightarrow I \rightarrow II \rightarrow IV$
• D
  $I \rightarrow III \rightarrow II \rightarrow IV$