A) \[1.0\,\mu Ci\]
B) \[0.5\,\mu Ci\]
C) \[4\,\mu Ci\]
D) \[8\,\mu Ci\]
Correct Answer: D
Solution :
Two months mean 2 half-life periods. Two months earlier, the activity was \[=2\times {{2}^{2}}=8\mu Ci\]
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