In which radioactive disintegration, neutron dissociates into proton and electron

  • A

    $H{e^{ + + }}$ emission

  • B

    $\beta - $emission

  • C

    $\gamma - $emission

  • D

    Positron emission

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${U^{238}}$ decays into $T{h^{234}}$ by the emission of an $\alpha - $ particle. There follows a chain of further radioactive decays, either by $\alpha - $ decay or by $\beta $ - decay. Eventually a stable nuclide is reached and after that, no further radioactive decay is possible. Which of the following stable nuclides is the and product of the ${U^{238}}$ radioactive decay chain