If light of wavelength `lambda_(1)` is allowed to fall on a metal , then kinetic energy of photoelectrons emitted is `E_(1)`. If wavelength of light changes to `lambda_(2)` then kinetic energy of electrons changes to `E_(2)`. Then work function of the metal is
A. `(E_(1)E_(2)(lamda_(1)-lamda_(2)))/(lamda_(1)lamda_(2))`
B. `(E_(1)lamda_(1)-E_(2)lamda_(2))/((lamda_(1)-lamda_(2)))`
C. `(E_(1)lamda_(1)-E_(2)lamda_(2))/((lamda_(2)-lamda_(1)))`
D. `(lamda_(1)lamda_(2)E_(1)E_(2))/((lamda_(2)-lamda_(1)))`
