A nucleus \(_Z^AX\) has mass represented by m(A.Z). If mp and mn denote the mass of proton and neutron, respectively and BE the binding energy (in MeV), then
(a) BE = [m(A,Z) - Zmp - (A - Z)mn]c2
(b) BE = [Zmp + (A - Z)mn - m(A,Z)]C2
(c) BE = [Zmp - Amn - m(A,Z)]C2
(d) BE = m(A,Z) - Zmp - (A - Z)mn