[单选题]
The electron of a hydro8:tu3m4f9qw y egzl.,8ed sdmgen atom makes a transitivc6 pbvklgdm- 4h762 lon from the n = 5 state to the n = 2 state. What is the wavelength of the emitted photplvk6cvgblh2d67- m4 on?
A. $344 \; nm$
B. $434 \; nm$
C. $443 \; nm$
D. $523 \; nm$