Two ions having masses in the ratio $1: 1$ and charges $1: 2$ are projected into a uniform magnetic field perpendicular to the field with speeds in the ratio $2: 3$. The ratio of the radii of circular paths along which the two particles move is :

  • A
    $4: 3$
  • B
    $2: 3$
  • C
    $3: 1$
  • D
    $1: 4$

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