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[" 34.(B) Neutrinos "quad " (C) Helium n...

[" 34.(B) Neutrinos "quad " (C) Helium nuclei (D) Electrons "],[" (A) Protons activity of "6000" dps,"140" days later it's activity "],[" becomes "300" dps.What was its initial activity."],[[" (A) "20000" dps "," (B) "24000" dps "," (C) "12000" dps "," (D) "6000" dps "2004" (Scr) "]]

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