3. Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds ?

1. Decreased salinity in the river

2. Pollution of groundwater

3. Lowering of the water-table

 

Select the correct answer using the code given below :

1. 1 only

2. 2 and 3 only

3. 1 and 3 only

4. 1 ,2 and 3

Correct Answer :

2 and 3 only