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Let gravitational potential energy U is ...

Let gravitational potential energy U is given by `U=Asqrtx/(B+x^2)`, where x is distance. The dimensional formula of A/B is

A

`[ML^(5/2)T^(-2)]`

B

`[ML^(1/2)T^(-2)]`

C

`[ML^(3/2)T^(-2)]`

D

`[ML^2T^(-2)]`

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