A radioactive element $X$ emits six $\alpha$-particles and four $\beta$-particles leading to ond product ${ }_{82}^{208} Pb$. $X$ is

  • A

    ${ }_{92}^{238} U$ 

  • B

    ${ }_{90}^{230} Th$

  • C

    ${ }_{90}^{232} Th$

  • D

    ${ }_{92}^{239} U$

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How many alpha and beta particles are emitted when Uranium ${ }_{92} U ^{238}$ decays to lead ${ }_{82} Pb ^{206}$ ?

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