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In a metre bridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y?

( A ) 80 cm
( B ) 50 cm
( C ) 40 cm
( D ) 70 cm

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