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    Question

    The masses of two radioactive substances are same and

    their half lives are 1 year and 2 years respectively. The ratio of their activities after 6 years will be
    A 1 : 4 Correct Answer Incorrect Answer
    B 1 : 2 Correct Answer Incorrect Answer
    C 1 : 3 Correct Answer Incorrect Answer
    D 1 : 6 Correct Answer Incorrect Answer

    Solution

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