`C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is reduced to `25mg` in a)11520years b)2880years c)1440years d)1

`C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is reduced to `25mg` in a)11520years b)2880years c)1440years d)1
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`C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is ... 11520 years B. 2880 years C. 1440 years D. 17280 years
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