[单选题]
The binding energy of the hydrogen at a2k t5oc4 ,rozlnv9s42bwat 0om in its ground state is -13.6 eV. Wh an hjb.0j.1dh *g6hxsat is the energy xn j.g6.*h jshhb1d a0when it is in the n = 5 state?
A. $2.72 \; eV$
B. $-2.72 \; eV$
C. $0.544 \; eV$
D. $-0.544 \; eV$