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

Question

$\begin{array}{1 1} \text{(a) depends on the nature of the metal used} \\ \text{(b) depends on the intensity of the radiation} \\ \text{(c) both A & B} \\ \text{ (d) Depends on neither A nor B} \end{array}$