[单选题]
The binding energy of the hydrogen atom in its g8opnk7e 0 7 5ug*lfmihround s, (na7awq ndd2j sv;2state is -13.6 eV. What is the energy when it is in the n = 5 statsj2 qd2awan(,vs;7 dne?
A. $2.72 \; eV$
B. $-2.72 \; eV$
C. $0.544 \; eV$
D. $-0.544 \; eV$