[单选题]
A monochromatic light h 4qjl +l+t;a zr;ke8ais incident on the surface of a metal with work funct;1udh lq(s .ggion 2.50 eV. If a 1.0-V stopping potential is reqdquhs ;gg l(1.uired to make the photocurrent zero, what is the wavelength of light?
A. $354 \; nm$
B. $423 \; nm$
C. $497 \; nm$
D. $744 \; nm$
