Light described at a place by the equation $\;\varepsilon=(100 V/m)\;[sin(5\times10^{15} s^{-1})t+sin(8 \times10^{15})t]\;$ falls on a metal surface having work function 2eV . Than maximum kinetic energy of photo electrons will be :

Question

$(a)\;5.2 eV\qquad(b)\;4.17 eV\qquad(c)\;3.27 eV\qquad(d)\;6.2 eV$