Answer: north.
- A north
- B south
- C east
- D west
Correct answer: A. north
Explanation: Field lines leave the north pole and enter the south pole outside the magnet.
Magnetic field lines form closed loops: outside the bar magnet they run from the N pole to the S pole; inside, they continue from S back to N, so the lines never start or end anywhere.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.