Final answer:
The correct option is c. Bipolar
A bar magnet is bipolar and has two poles: a north pole and a south pole. This bipolar nature is seen in all magnets, and no matter how you divide a magnet, it will still have a north and a south pole, thus monopoles do not exist.
Step-by-step explanation:
A bar magnet is bipolar, which means it has two poles: a north pole and a south pole. This is a fundamental characteristic of magnets. When a bar magnet is suspended and allowed to rotate freely, it will align itself with the Earth's magnetic field; consequently, one pole will always orient toward the north and the other toward the south. This property is what led to the creation of the compass, a pivotal navigational tool throughout history.
The concept of magnetic poles is critical to understanding how magnets interact with each other and with magnetic fields, as like poles repel while unlike poles attract. Regardless of the shape, size, or strength of a magnet, it will always have both a north and a south pole, and there are no exceptions to this rule, meaning that magnetic monopoles do not exist.