Match the type of interaction in Column $I$ with the distance dependence of their interaction energy in Column $II$:

$I$. Ion-ion	$a$. $1/r$
$II$. Dipole-dipole	$b$. $1/r^{2}$
$III$. London dispersion	$c$. $1/r^{3}$
	$d$. $1/r^{6}$

• A
  $I-a, II-b, III-c$
• B
  $I-a, II-c, III-d$
• C
  $I-a, II-b, III-d$
• D
  $I-b, II-d, III-c$