[单选题]
A monochromatic light is i3s;latx h+jycb5 8 3yex ozk wq+a;k8)ncident on thrrrf6 omyn f /6-3mge2e surface of a metal with work function 2.50 eV.-23/6f mygf r enrm6or If a 1.0-V stopping potential is required to make the photocurrent zero, what is the wavelength of light?
A. $354 \; nm$
B. $423 \; nm$
C. $497 \; nm$
D. $744 \; nm$
