Match the following columns regarding membrane transport mechanisms:

Column-$I$	Column-$II$
$P$. Uniport	$I$. $A$ molecule moves across the membrane independent of other molecules.
$Q$. Symport	$II$. Two molecules move in opposite directions.
$R$. Antiport	$III$. Two molecules cross the membrane in the same direction.

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