6. 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. 1 only

2. 2 and 3

3. 2 only

4. 1 and 3

Correct Answer :

1 only