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The number of \( \alpha \) and \( \beta^{-} \)emitted during the radioactive decay chain starting from \( { }_{88}^{226} \mathrm{Ra} \) and ending at \( { }_{82}^{206} \mathrm{~Pb} \) is :
\( \mathrm{P} \)
(A) \( 3 \alpha \& 6 \beta^{-} \)
(B) \( 4 \alpha \& 5 \beta^{-} \)
W
(C) \( 5 \alpha \& 4 \beta^{-} \)
(D) \( 6 \alpha \& 6 \beta^{-} \)
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