Statement I: We cannot think of magnetic field configuration with three poles.
Statement II: A bar magnet does exert a torque on itself due to its own field.

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Statement I is correct and statement II is incorrect.

Statement I is incorrect and statement II is correct.

Both statements are correct.

Both statements are incorrect.

answer is D.

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Detailed Solution

It is quite clear that magnetic poles always exist in pairs. Since one can imagine magnetic field configuration with three poles when north poles or south poles of two magnets are glued together. They provide a three-pole fleld configuration. It is also known that a bar magnet does not exert a torque on itself due to own its field. Torque is the cross product of M and B. As the magnetic field B is due to the magnetic moment M the value of cross product will be zero (since M and B are parallel)

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