Magnetism And Matter

Pick out the WRONG statements about magnetic substances.
($\chi$ = magnetic susceptibility)
($\mu_r$ = relative permeability).
I. Substances with $-1 \leq \chi < 0$ are diamagnetic.
II. Substances with $\chi \gg 1$ are paramagnetic.
III. Substances with $\chi \ll 1$ are ferromagnetic.
IV. Substances with $\mu_r \gg 1$ are ferromagnetic.