Arrange the following particles in the increasing order of their $e/m$ ratio: electron $(e)$,proton $(p)$,neutron $(n)$,and $\alpha$-particle $(\alpha)$.

  • A
    $n, p, e, \alpha$
  • B
    $n, \alpha, p, e$
  • C
    $n, p, \alpha, e$
  • D
    $e, p, n, \alpha$

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