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In which o the following cases the centr...

In which o the following cases the centre of mass of a rod is certainly not at its centre?

A

the density cintinuously increase from left to right

B

the density con tinuously decreases from left to right

C

the density decreases from left to tight upto the center and then incrases

D

the density increases from left to right upto the centre and then decreases

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