What is the direction of magnetic field lines outside a magnet?

CONCEPT:

• Magnet: A magnet is an object that has a magnetic field. A magnet attracts or repels other items.
  • In magnets like poles or magnetic materials are attracted and opposite poles are repelled.
• Magnetic field lines: Magnetic field strength is shown with the help of magnetic field lines also known as magnetic lines of force.
• And as we can see magnetic field strength of any bar magnet is more at the poles compared to its center and this also true for any other magnetic material. 

EXPLANATION:

• The direction of magnetic field lines outside a magnet is from the North Pole to the South Pole. So option 3 is correct.
• This is because the North and South poles of a magnet attract each other due to the position and motion of electric charges.