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Water Supply Engineering
Pick up the correct statement from the following :
The precipitation during its travel in atmosphere dissolves certain gases
Rain water which percolates through the ground, is free from suspended materials
Under ground water may dissolve minerals and salts present in the earth's layers
Small quantities of iron, calcium and magnesium dissolved in water, may be useful for human health
All the above.
Correct Answer:
All the above.
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Water Supply Engineering
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