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Which isotope is radioactive?

Practice MCQ for SSC, UPSC, RRB Exams

A. ¹H A.

B. ²H B.

C. ³H C.

D. ⁴He D.

Correct Answer: C সঠিক উত্তর: C

Explanation ব্যাখ্যা

Tritium (³H) is radioactive.

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