A radioactive nucleus with $Z$ protons and $N$ neutrons emits an $\alpha - $ particle, $2\beta$- particles and $2$ gamma rays. The number of protons and neutrons in the nucleus left after the decay respectively, are

  • A

    $Z -3, N -1$

  • B

    $Z -2, N -2$

  • C

    $Z -1, N -3$

  • D

    $Z, N -4$

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