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A particle of mass m1, hits another part...

A particle of mass `m_1`, hits another particle in rest of mass `m_2`, obliquely, If both the particles after elastic collision moves perpendicular to each other then `m_1 /m_2` is

A

`4 m/S^2`

B

`1 m/S^2`

C

`6 m/S^2`

D

`2 m/S^2`

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