An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly) $\left({\mathrm{m}}_{\mathrm{e}}=9\times {10}^{-31} \mathrm{kg}\right)$

• A

  $12.2\mathrm{nm}$

• B

  $12.2\times {10}^{-13} \mathrm{m}$

• C

  $12.2\times {10}^{-12} \mathrm{m}$

• D

  $12.2\times {10}^{-14} \mathrm{m}$