Answer: Diamagnetic.
- A Diamagnetic
- B Paramagnetic
- C Ferromagnetic
- D Non-magnetic
Correct answer: A. Diamagnetic
Explanation: Diamagnetic materials develop a weak magnetisation opposite to the applied field, causing them to be feebly repelled by magnets.

Magnetic field of a bar magnet: field lines emerge from the north pole and re-enter at the south pole outside the magnet, forming continuous closed loops. Image: Geek3, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.