एक रेडियोएक्टिव पदार्थ का क्षय नियतांक `3.456xx10^(-4)` प्रतिवर्ष है। इसकी लगभग अर्द्ध-आयु है :
A. 2000 वर्ष
B. 2400 वर्ष
C. 2600 वर्ष
D. 6300 वर्ष
A. 2000 वर्ष
B. 2400 वर्ष
C. 2600 वर्ष
D. 6300 वर्ष
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Correct Answer – A