According to de-Broglie,the de-Broglie wavelength for an electron in an orbit of radius $5.3 \times 10^{-11} \ m$ of a hydrogen atom is $10^{-10} \ m$. The principal quantum number for this electron is:

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

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