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A particle starts moving from rest along y axis and a variable force F acts on it such that `F infty y^-frac{1}{5}` (y>0). The variation of power P of this force with y is given as

A

`P infty y^frac{1}{5} `

B

`P infty y^-frac{1}{5} `

C

`P infty y^frac{2}{5} `

D

P = constant

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