A proton, a deuteron and an $\alpha-$particle with same kinetic energy enter into a uniform magnetic field at right angle to magnetic field. The ratio of the radii of their respective circular paths is
  • A$1: \sqrt{2}: \sqrt{2}$
  • B$1: 1: \sqrt{2}$
  • C$\sqrt{2}: 1: 1$
  • D$1: \sqrt{2}: 1$
JEE MAIN 2022, Medium
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