Even the radiation of highest wavelength in the ultraviolet region of hydrogen spectrum is just able to eject photoelectrons from a metal. The value of threshold frequency for the given metal is

A

$$3.83\times 10^{15}$$ Hz

B

$$4.33\times 10^{14}$$ Hz

C

$$2.46\times 10^{15}$$ Hz

D

$$7.83\times 10^{14}$$ Hz