A particle starting from rest falls from...

A particle starting from rest falls from a certain height. Assuming that the value of acceleration due to gravity remains the same throughout the motion is displacement in three successive half second intervals are `S_1.S_2.S_3` then `S_1.S_2.S_3` is given by :

`1:5:9`

`1:2:3`

`1:1:1`

`1:3:5`

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