[单选题]
The electron of a hydtjhn*v qf 69cqrs19u6rogen tg6tkh6:/v,o;:p0 pjcd we en atom makes a transition from the n = 5 state to the n = 2 s/ogh ed et:jnc6k0:; p t,w6pvtate. What is the wavelength of the emitted photon?
A. $344 \; nm$
B. $434 \; nm$
C. $443 \; nm$
D. $523 \; nm$