$F_{pp}$, $F_{nn}$, and $F_{np}$ are the nuclear forces between proton-proton, neutron-neutron, and neutron-proton respectively. Then the relation between them is:

  • A
    $F_{pp} = F_{nn} \neq F_{np}$
  • B
    $F_{pp} \neq F_{nn} = F_{np}$
  • C
    $F_{pp} = F_{nn} = F_{np}$
  • D
    $F_{pp} \neq F_{nn} \neq F_{np}$

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