A source emits photons of energy 5 eV which are incident on a metallic sphere of work function 3.0 eV. The radius of the sphere is $$r = 8 \times 10^{-3}$$ m. It is observed that after some time emission of photoelectrons from the metallic sphere is stopped. Charge on the sphere when the photoemission stops is

A

$$1.77 \times 10^{-16}$$ C

B

$$1.77 \times 10^{-12}$$ C

C

$$1.11 \times 10^{-12}$$ C

D

$$1.11 \times 10^{-10}$$ C