There are four light-weight rod samples $A, B, C, D$ separately suspended by threads. $A$ bar magnet is slowly brought near each sample and the following observations are noted:
$(i)$ $A$ is feebly repelled
$(ii)$ $B$ is feebly attracted
$(iii)$ $C$ is strongly attracted
$(iv)$ $D$ remains unaffected
Which one of the following is true?

• A
  $B$ is of a paramagnetic material
• B
  $C$ is of a diamagnetic material
• C
  $D$ is of a ferromagnetic material
• D
  $A$ is of a non-magnetic material