Among the following properties describing diamagnetism, identify the property that is wrongly stated.

  • A
    Diamagnetic materials do not have a permanent magnetic moment.
  • B
    Diamagnetism is explained in terms of electromagnetic induction.
  • C
    Diamagnetic materials have a small positive susceptibility.
  • D
    The magnetic moment of individual electrons neutralize each other.

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Pick out the $WRONG$ statements about magnetic substances ($\chi = \text{magnetic susceptibility}$, $\mu_r = \text{relative permeability}$).
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$II$. Substances with $\chi \gg 1$ are paramagnetic
$III$. Substances with $\chi \ll 1$ are ferromagnetic
$IV$. Substances with $\mu_r \gg 1$ are ferromagnetic

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