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Question
Where do magnetic field lines intersect ? 
Options:
A .  They do not intersect.
B .  At an angle of 45∘ to each other.
C .  At right angles to one another.
D .  At an angle of 60∘ to one another
Answer: Option A
:
A
The magnetic field lines indicate the direction of magnetic field at a point. If they intersect at a point, there would be more than one direction of magnetic field which is practically not possible.

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