List-I (Material)	List-II (Susceptibility (x))
A. Diamagnetic	I. $\mathrm{\chi <!--\; \chi \; -->}=0$
B. Ferromagnetic	II. $0>\mathrm{\chi <!--\; \chi \; -->}\ge <!--\; \ge \; -->-<!--\; -\; -->1$
C. Paramagnetic	III. $\mathrm{\chi <!--\; \chi \; -->}>>1$
D. Non-Magnetic	IV. $0<\mathrm{\chi <!--\; \chi \; -->}<\mathrm{\epsilon <!--\; \epsilon \; -->}$ (a small positive number)

Choose the correct answer from the options given below

The correct match is A-II, B-III, C-IV, D-I.

To understand the mapping, let us analyze the magnetic susceptibility ($\chi$) for different classes of materials:

A. Diamagnetic Materials:
Diamagnetic materials are weakly repelled by a magnetic field. When placed in an external magnetic field, they develop a weak magnetization in the opposite direction. Therefore, their magnetic susceptibility is negative and lies in the range:
$0>\chi \ge -1$
Hence, A matches with II.

B. Ferromagnetic Materials:
Ferromagnetic materials are strongly magnetized in the direction of the external magnetic field. They retain magnetization even after the external field is removed. Consequently, their magnetic susceptibility is positive and extremely large:
$\chi >>1$
Hence, B matches with III.

C. Paramagnetic Materials:
Paramagnetic materials are weakly magnetized in the direction of the external magnetic field. Their magnetic susceptibility is a small, positive number:
$0<\chi <\epsilon$ (where $\epsilon$ is a small positive number)
Hence, C matches with IV.

D. Non-Magnetic Materials:
Non-magnetic materials do not interact with magnetic fields at all and cannot be magnetized. Thus, their magnetic susceptibility is zero:
$\chi =0$
Hence, D matches with I.

Combining these individual matches, we obtain:
A-II, B-III, C-IV, D-I.