Q. 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.
Select the correct answer using the code given below :

[A] 1 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: B