A stationary particle explodes into two particles of a masses m₁ and m₂ which move in opposite directions with velocities v₁ and v₂ The ratio of their kinetic energies E₁/E₂ is

• A

  ${\mathrm{m}}_1/{\mathrm{m}}_2$

• B

  1

• C

  ${\mathrm{m}}_1{\mathrm{v}}_2/{\mathrm{m}}_2{\mathrm{v}}_1$

• D

  ${\mathrm{m}}_2/{\mathrm{m}}_1$