The work function of a metallic surface is 5.01 eV.  The photoelectrons are emitted when light of wavelength 2000 $\text{Å}$ falls on it. The potential difference applied to stop
the fastest photoelectrons is $\left[h=4.14\times {10}^{-15}\mathrm{eVs}\right]$

• A

  1.2V

• B

  2.24 V

• C

  3.6V

• D

  4.8V