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A glass of water is kept on a table in t...

A glass of water is kept on a table in the dining car of a train. If the acceleration of the train is `g//5` in the forward direction, the surface of water is inclined to the horizontal at an angle of

A

`tan^(-1) (5//2)`

B

`tan^(-1) (2//5)`

C

`tan^(-1) (1//5)`

D

`tan^(-1) (5)`.

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