[单选题]
The electron of a hyd84htqs;8la 5napk /+f czvzl, rwfrkq29o5 i p99a.f;uk 7rpzf ogen atom makes a transition from the n = 5 state to the n = 2 state. What is 5if9;zrorapk7wf2pu9. f q9kthe wavelength of the emitted photon?
A. $344 \; nm$
B. $434 \; nm$
C. $443 \; nm$
D. $523 \; nm$