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A light cylindrical vessel is kept on a ...

A light cylindrical vessel is kept on a horizontal surface it's base area is `A`. A hole of cross-sectional area `a` is made just at it's bottom side. The minimum coefficient of friction necessary for not sliding of vessel due to the impact force of the emerging liquid.

A

varying

B

`a/A`

C

`(2a)/A`

D

None of these

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