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নিম্নের কোন নিউক্লিয়াস যুগলটিকে আইসোটোন বলা হবে?

\frac{32}{16} S, \frac{34}{16} S

\frac{12}{6} C, \frac{14}{6} C

\frac{12}{6} C, \frac{13}{7} N

\frac{14}{7} N, \frac{14}{6} C

ANS : 3

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