If \( M_{0}\) is the mass of isotope \({ }_{5}^{12} B,\ M_{p}\) and \(M_{n}\) are the masses of proton and neutron, then nuclear binding energy of isotope is :
(1) \(\left(5 \ M_{p}+7 M_{n}-M_{o}\right) C^{2}\)
(2) \(\left(\mathrm{M}_{\mathrm{o}}-5 \mathrm{M}_{\mathrm{p}}\right) \mathrm{C}^{2}\)
(3) \( \left(\mathrm{M}_{\mathrm{o}}-12 \mathrm{M}_{\mathrm{n}}\right) \mathrm{C}^{2}\)
(4) \(\left(M_{0}-5 M_{p}-7 M_{n}\right) C^{2}\)