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কোন জোড়টি পরস্পর Isobar-

{}_{29}^{64}C u, {}_{30}^{64}Z n

{}_{29}^{62}C u, {}_{30}^{62}Z n

{}_{29}^{63}C u, {}_{30}^{63}Z n

{}_{30}^{64}C u, {}_{29}^{64}Z n

ANS : 1

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