Match List-I with List-II.

	List - I		List - II
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	B	C	D
1.	I	II	III	IV
2.	I	III	II	IV
3.	IV	III	II	I
4.	IV	III	I	II