An electron accelerated under a potential difference of $\mathrm{V}$ volt has a certain wavelength $\lambda$. It is known that the mass of a proton is about $1800$ times the mass of an electron. If a proton has to have the same wavelength $\lambda$, then it will have to be accelerated under the potential difference of

• A

  $V \mathrm{volt}$
• B

  $1800 \mathrm{volt}$
• Correct answer
  C

  $\frac{V}{1800}\mathrm{volt}$
• D

  $\sqrt{1800} \mathrm{volt}$

Hence, the correct answer is option: 'C'.