Statement (A) Magnetic monopoles do not exist, they always exist in pairs as South and North poles but electric monopoles exist. So, statement A is incorrect. Statement (B) In solenoid have a both ends, so magnetic field lines cannot be confined. Inside the solenoids, the magnetic field lines are parallel to the length of the conductor. So, statement B is incorrect. Statement (C) In toroid has no ends. It is closed loop conductor, so the magnetic field lines are completely confined. So, the statement C is correct. Statement (D) Inside the bar magnet, the magnetic field lines are parallel. So, the statement D is incorrect. Statement (E) Magnetic susceptibility of the diamagnetic material is −1. So, the statement E is correct. Hence, the correct statements are C and E.
