Choose the correct nuclear process from the below options [ p:. proton, n: neutron, e^-: electron, e^+: positron, ν: neutrino, ν̄: antineutrino ]

Choose the correct nuclear process from the below options $\displaystyle \left[\mathrm{p}:\right.$ proton, $\displaystyle \mathrm{n}:$ neutron, $\displaystyle \mathrm{e}^{-}:$electron $\displaystyle , \mathrm{e}^{+}:$positron, $\displaystyle \nu:$ neutrino, $\displaystyle \bar{\nu}:$ antineutrino $\displaystyle ]$