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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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