North pole of a magnet can be identified by:

1.	North pole of a magnet can be identified by:
A.	Using iron nails
B.	Another magnet without marked poles
C.	in the ratio of half the atomic weight of copper to the atomic weight of silver
D.	Another magnet having marked north and South Pole
E.	None of these
Answer» E. None of these

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Select the correct statement:

North pole of a magnet can be identified by:

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