Which of the following statement(s) is/are correct ?
Options:
(a) Magnetic phenomena are not universal in nature.
(b) The name lodestone(or loadstone)given to a naturally occurring ore of iron magnetite means leading stone.
(c) A bar magnet is not analogous to a solenoid.
(d) The magnetic field lines are discontinuous, emerging from one face of the solenoid to the infinity.