In a radioactive decay chain, the initial nucleus is \( { }_{90}^{232} T h \). At the end there ...

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In a radioactive decay chain, the initial nucleus is \( { }_{90}^{232} T h \). At the end there are \( 6 \alpha \)-particles and \( 4 \beta \)-particles which are emitted. If the end nucleus is \( { }_{Z}^{A} X, A \) and \( Z \) are given by
[JEE (Main) 2019]
(a) \( A=202 ; Z=80 \)
(b) \( A=208 ; Z=80 \)
(c) \( \quad A=200 ; Z=81 \)
(d) \( A=208 ; Z=82 \)
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