According to Einstein’s photoelectric equation, the plot of the KE of emitted photoelectrons from a metal and the frequency of the incident radiation, gives a straight line, whose slope          

• A

  depends both on the intensity of the radiation and the metal used

• B

  depends on the intensity of the radiation

• C

  depends on the nature of the metal used

• D

  is the same for the all metals and independent of the intensity of the radiation.