If the magnetic dipole of an atom of diamagnetic material, paramagnetic material are denoted by $\mu_d, \mu_p$ and $\mu_f$ respectively, then:

• Correct answer
  A

  $\mu_d=0$ and $\mu_p \neq 0$
• B

  $\mu_d \neq 0$ and $\mu_p=0$
• C

  $\mu_p=0$ and $\mu_f \neq 0$
• D

  $\mu_d \neq 0$ and $\mu_f \neq 0$

Hence, the correct answer is option: 'A'.