${ }_{92} U^{235}$ undergoes successive disintegrations with the end product of ${ }_{82} Pb^{203}$. The number of $\alpha$ and $\beta$ particles emitted are

  • A
    $\alpha=6, \beta=4$
  • B
    $\alpha=6, \beta=0$
  • C
    $\alpha=8, \beta=6$
  • D
    $\alpha=3, \beta=3$

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