Which of the following isn't a magnetic field source?

Magnetic field: The magnetic field line always creates a closed-loop, starting at the north pole and ending at the south pole.

Electric currents and magnets combine to create it.

A magnetic field is created by an electric current.

The magnetic field cannot be created by a static charge. As a result, option B is right.

A magnetic field may be created by a revolving magnet.

A current-carrying galvanometer may generate a magnetic field.