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An isolated particle of mass m is moving...

An isolated particle of mass `m` is moving in horizontal plane` xy` along the `x`-axis, at a certain height above the ground. It suddenly explodes into two fragment of masses `m//4` and `3m//4`. An instant later, the smaller fragment is at `y=+15` cm. The larger fragment at this instant is at

A

`y=-5cm`

B

`y=+20cm`

C

`y=+5cm`

D

`y=-20cm`

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The correct Answer is:
A
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