The direction of magnetic field lines in a region outside the bar magnet is $.....$

• A
  from the $N$-pole towards the $S$-pole of a magnet.
• B
  from the $S$-pole toward the $N$-pole of a magnet.
• C
  in the direction coming out from both the poles of magnet.
• D
  in the direction entering in both the poles of magnet.