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:
Options
(a)1 only
(b)2 and 3 only
(c)1 and 3 only
(d)1, 2 and 3
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