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Which of the following has/have shrunk immensely/dried up in the recent past due to human activities ? 1. Aral Sea 2. Black Sea 3. Lake Baikal Select the correct answer using the code given below :

  1. (a)1 only
  2. (b)2 and 3
  3. (c)2 only
  4. (d)1 and 3
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Official answer(a) 1 only