The photoelectric work function of the emitter of a photocell is 3.63 eV . The frequency of incident light radiation if the stopping potential of the emitter is 3 volt , is
A. `1. 1 xx 10^(15) ` Hz
B. `6.6 xx 10^(15)` Hz
C. `1.6 xx 10^(15)` Hz
D. `6.1 xx 10^(15)` Hz