If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by \(\mu_{d} \mu_{p}\) and \(\mu_{f}\) respectively, then
(a) \(\mu_{\mathrm{d}}=0\) and \(\mu_{\mathrm{p}} \neq 0\)
(b) \(\mu_{\mathrm{d}} \neq 0\) and \(\mu_{\mathrm{p}}=0\)
(c) \(\mu_{p}=0\) and \(\mu_{f} \neq 0\)
(d) \(\mu_{\mathrm{d}} \neq 0\) and \(\mu_{f} \neq 0\)