If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferro-magnetic material are denoted by ${\mathrm{\mu }}_{\mathrm{d},} {\mathrm{\mu }}_{\mathrm{p}} \mathrm{and} {\mathrm{\mu }}_{\mathrm{f}}$ respectively, then

• A

  ${\mathrm{\mu }}_{\mathrm{p}}=0\text{ and }{\mathrm{\mu }}_{\mathrm{f}}\ne 0$

• B

  ${\mathrm{\mu }}_{\mathrm{d}}\ne 0\text{ and }{\mathrm{\mu }}_{\mathrm{p}}=0$

• C

  ${\mathrm{\mu }}_{\mathrm{d}}\ne 0\text{ and }{\mathrm{\mu }}_{\mathrm{f}}\ne 0$

• D

  ${\mathrm{\mu }}_{\mathrm{d}}=0\text{ and }{\mathrm{\mu }}_{\mathrm{p}}\ne 0$