If the nuclear force between two protons, two neutrons and between proton and neutron is denoted by `F_(p p), F_(n n)` and `F_(pn)` respectively, then

Options

A. `F_(pp) ne F_("nn" ) " and " F_(pp) = F_("nn" )`
B. `F_(pp) = F_("nn") = F_(pn)`
C. `F_(pp) ne F_("nn") ne F_(pn)`
D. `F_(pp) ~~ F_("nn") ~~ F_(pn)`

Answer

B

Explanation

Nuclear forces are charged independent and have the same strength for nn, pp or np. Thus `F_(pp) = F_("nn") = F_(pn) ` .