A radioactive nucleus (initial mass number A and atomic number \( Z...

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A radioactive nucleus (initial mass number A and atomic number \( Z \) ) emits \( 3 \alpha \)-particles and 2 positrons. the ratio of number of neutrons to that of protons in the final nucleus will be
\( \mathrm{P} \)
W
(A) \( \frac{A-Z-8}{Z-4} \)
(B) \( \frac{A-Z-4}{Z-8} \)
(C) \( \frac{A-Z-12}{Z-4} \)
(D) \( \frac{A-Z-4}{Z-2} \)
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