A tiny bar magnet is kept close to a long current carrying straight wire placed along the $z$ axis. When the center of the magnet is at $(a, 0,0)$ and it is oriented along the $z$ axis, it experiences

• Correct answer
  A

  no net force but a net torque.
• B

  neither net force nor net torque.
• C

  both a net force and a net torque.
• D

  a net force but no net torque.

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