[单选题]
The binding energy of the hydrogen atom in p zv1r,hrou.1i p12pfg5*ej6cpti ps +kw: .vjts ground state is -13.6 eV. What is the energy when it is in the n = 5 state+j scv:ifpp1pw.jgt62ep k 5*?
A. $2.72 \; eV$
B. $-2.72 \; eV$
C. $0.544 \; eV$
D. $-0.544 \; eV$