What does a higher degree of closeness of magnetic field lines indicate?

Question

What does a higher degree of closeness of magnetic field lines indicate? — Exam MCQ

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C. Stronger magnetic field at that region — The correct choice is Stronger magnetic field at that region. The result follows from the relevant magnetic-field, electromagnetic-induction or Fleming/right-hand-rule principle.

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A. The field lines are about to cross

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B. Weaker magnetic field at that region

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D. Presence of electric field

What does a higher degree of closeness of magnetic field lines indicate?

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