A rod of mass \( m \) and length \( l \) is lying on a horizontal table. Work done in making it ...

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A rod of mass \( m \) and length \( l \) is lying on a horizontal table. Work done in making it stand on one end will be:
(A) \( m g l \)
(B) \( m g l / 2 \)
(C) \( m g l / 4 \)
(D) \( 2 m g l \)
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