[单选题]
The electron of a hydrogen atom ma0ta(ko z 0 k6sigiup8(n+yk( v7grv+c/bs n-l(xv9sukes a transition from the n = 5 state to the n = 2 state. What is the wavelength of the emivbk-7yv r+vg(s/n+9n(uclxs tted photon?
A. $344 \; nm$
B. $434 \; nm$
C. $443 \; nm$
D. $523 \; nm$