List the Number of Protons, Neutrons, and Nucleons (Protons $^{137}_{~~56}$ Ba
A) 56, 81, 137
B) 81, 56, 137
C)

List the number of protons, neutrons, and nucleons (protons + neutrons) , in that order, for an isotope with the symbol: $^{137}_{~~56}$ Ba

A) 56, 81, 137
B) 81, 56, 137
C) 56, 137, 193
D) 137, 56, 193
E) 81, 137, 218