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A, B, C are points in a vertical line su...

A, B, C are points in a vertical line such that `AB=BC`. If a body falls freely from rest at A, and `t_1` and `t_2`are times taken to travel distances AB and BC, then ratio `(t_2/t_1)` is

A

`sqrt2 +1`

B

`sqrt2 -1`

C

`2 sqrt2`

D

`1/sqrt2 +1`

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