কোনটি তেজস্ক্রিয় আইসোটোপ নয়?

A \( {}^{60}\text{Co} \)

B \( {}^{31}\text{P} \)

C \( {}^{35}\text{S} \)

D \( {}^{65}\text{Zn} \)

Solution

Correct Answer: Option B

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