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.

• A
  $i-d, ii-b, iii-c, iv-a$
• B
  $i-d, ii-b, iii-a, iv-c$
• C
  $i-b, ii-d, iii-c, iv-a$
• D
  $i-b, ii-a, iii-d, iv-c$