Let Fpp, Fpn and Fnn denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. When the separation is 1fm,
(a) Fpp > Fpn = Fnn
(b) Fpp = Fpn = Fnn
(c) Fpp > Fpn > Fnn
(d) Fpp < Fpn = Fnn
