The work function of a metal is $2 \ eV$. If a radiation of wavelength $3000 \ \text{Å}$ is incident on it,the maximum kinetic energy of the emitted photoelectrons is (Planck's constant $h=6.6 \times 10^{-34} \ \text{Js}$; velocity of light $c=3 \times 10^8 \ \text{m/s}$; $1 \ \text{eV}=1.6 \times 10^{-19} \ \text{J}$).

• A
  $4.4 \times 10^{-19} \ \text{J}$
• B
  $5.6 \times 10^{-19} \ \text{J}$
• C
  $3.4 \times 10^{-19} \ \text{J}$
• D
  $2.5 \times 10^{-19} \ \text{J}$