What kind of magnet is used in a magnetic compass?

While it should always be aligned with the earth's magnetic field, the job of a magnetic compass is to navigate and point to the north of that field. By directing the compass toward various magnets, the earth's magnetic field may be diverted, which always affects the compass.
As we can see from the sentence, the sort of magnet that should be employed in a compass is. Do we have to work for a set amount of time? No, so what kind of magnet do we need? It has an endlessly variable magnetic behavior. Therefore, a transient magnet cannot constitute the compass's fix.

In addition, as we can see from option (A), an electromagnet has the feature of producing a magnetic field when an electric current is coupled to a source, and that source may run out. It is not in a magnetic compass, making choice (A) inaccurate as well. We can now understand how a permanent magnet operates.
They have a substance where the internal makeup of the material produces the magnetic field. It maintains its property indefinitely and without a source or depletion.
As a result, Compass employs a permanent magnet.

Hence, the correct answer is option B.