Body at rest splits into two parts: ratio of their speeds or kinetic energies

1. A.
   $v_{B}:v_{A}$
2. B.
   $m_{B}:m_{A}$
3. C.
   $m_{B}v_{B}:m_{A}v_{A}$
4. D.
   $1:1$

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1. A.
   In opposite directions with speed in the ratio of $1:2$ respectively
2. B.
   In opposite directions with speed in the ratio of $2:1$ respectively
3. C.
   In the same direction with same speed.
4. D.
   In opposite directions with the same speed.

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