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A short bar magnet of mangetic moment 5*...

A short bar magnet of mangetic moment `5*25xx10^-2JT^-1` is placed with its axis perpendicular to earth's field direction. At what distance from the centre of the magnet, is the resultant field inclined at `45^@` with earth's field on (i) its normal bisector, (ii) its aixs? Magnitude of earth's field at the place `0*42G`. Ignore the length of the magnet in comparison to the distances involved.

A

1,2 and 3 are correct

B

1 and 2 are correct

C

2 and 4 are correct

D

1 and 3 are correct

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