What is the respective number of $\alpha $ and $\beta $ particles emitted in the following radioactive decay

$_{90}{X^{200}}{ \to _{80}}{Y^{168}}$

  • [AIPMT 1995]
  • A

    $6  \,and\,8$

  • B

    $8  \,and\,8$

  • C

    $6  \,and\,6$

  • D

    $8 \,and\, 6$

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