Match the following columns:

Column-$I$	Column-$II$
$P$. Interatrial septum	$I$. Thick fibrous tissue
$Q$. Interventricular septum	$II$. Thin wall
$R$. Atrioventricular septum	$III$. Thick wall

• A
  $(P-I), (Q-II), (R-III)$
• B
  $(P-II), (Q-III), (R-I)$
• C
  $(P-II), (Q-I), (R-III)$
• D
  $(P-III), (Q-II), (R-I)$