Paramagnetic substances:

$A$ sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of

Given below are two statements:
Statement $I:$ For a diamagnetic substance $-1 \leq \chi < 0$,where $\chi$ is the magnetic susceptibility.
Statement $II:$ Diamagnetic substances,when placed in an external non-uniform magnetic field,tend to move from the stronger to the weaker part of the field.
In the light of the above statements,choose the correct answer from the options given below.

The relation $H \propto I$ and the susceptibility $\chi = \frac{I}{H}$ are not applicable for which of the following substances?

$A$ diamagnetic material in a magnetic field moves:

The magnetic needle of a magnetic compass is made up of $\qquad$ .