Which of the statements below is correct?

Magnetic field lines: Magnetic field lines are imaginary lines that depict the direction of the magnetic field.

The magnetic lines of force have the following characteristics:

They're closed curves, for starters. They are from north to south pole outside the magnet, while the opposite is true inside the magnet.

2. The field is strong if the lines of force are congested at a location.

3. The magnetic field will be homogeneous in nature if the lines of force are parallel and equidistant.

4. Two magnetic lines of force will be close to intersecting.

5. The direction of the magnetic field vector at any point on the field lines is given by the tangent.

6. There are no magnetic monopoles.

Closed curves characterize magnetic field lines. As a result, option C is right.