A proton and an anti-proton come close to each other in vacuum such that the distance between them is $10 \,cm$. Consider the potential energy to be zero at infinity. The velocity at this distance will be ........... $\,m / s$

  • [KVPY 2020]
  • A

    $1.17$

  • B

    $2.3$

  • C

    $3.0$

  • D

    $23$

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