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If the magnetic dipole moments of an ato...

If the magnetic dipole moments of an atom of diamagnetic material,paramagnetic material and ferromagnetic material are denoted by `mu_d`,`mu_p` and `mu_f` respectively, then

A

`mu_d != 0 and mu_f != 0`

B

`mu_p = 0 and mu_f != 0`

C

`mu_d = 0 and mu_p != 0`

D

`mu_d != 0 and mu_p = 0`

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