Match List-$I$ with List-$II$ :

List-$I$ (Defects)	List-$II$ (Shown by)
$a$. Frenkel defect	$i$. Non-ionic solids and density of the solid decreases
$b$. Schottky defect	$ii$. Non-ionic solids and density of the solid increases
$c$. Vacancy defect	$iii$. Ionic solids and density of the solid decreases
$d$. Interstitial defect	$iv$. Ionic solids and density of the solid remains constant

Choose the correct answer from the options given below :

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