Question

But if the two magnetic field lines intersect one another, then the resultant force on a North Pole placed at the point of intersection will be along to directions, which is not possible. (b) Magnetic field lines are closed curves or forms a closed loop. This is because two magnetic field lines can never intersect.​

Answer 1

refer to the attachment

Answer 2

Two magnetic field lines do not intersect each other due to the fact that the resultant force on a north pole at any point can be only in one direction. ... this means that resultant force on a north place at the point of intersecting will be along two directions, which is not possible.