Two like poles of strengths `m_(1)` and `m_(2)` are at far distance apart. The energy repuired to bring them `r_(0)` distance ap

Two like poles of strengths `m_(1)` and `m_(2)` are at far distance apart. The energy repuired to bring them `r_(0)` distance apart is
A. `(mu_(0)m_(1)m_(2))/(4pir_(0))`
B. `(mu_(0)m_(1)m_(2))/(8pir_(0))`
C. `(mu_(0)m_(1)m_(2))/(16pir_(0))`
D. None of these

Two like poles of strengths `m_(1)` and `m_(2)` are at far distance apart. The energy repuired to bring them `r_(0)` distance apart is

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