From the following, identify the correct properties of magnetic field lines.
(a) Magnetic field lines are closed loops.
(b) Magnetic field lines are from north pole of magnet to its south pole, outside the magnet.
(c) Magnetic field lines intersect each other.
(d) If magnetic field lines are crowded, the magnetic field strength in that region is high.
(e) The number of magnetic field lines per unit area is called magnetic flux.
1
(a), (b), (c) and (d)
2
(b), (c), (e)
3
(a), (c), (d)
4
(a), (b), (d)