World Geography
The ground water that occurs when flow of the subterranean water is not confined by the presence of impermeable layers is called

artesian
aquifer
confined groundwater
unconfined groundwater

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World Geography
Which among the following period in the demographic history of India is called the Period of Stable Population?

1891 to 1921
1981 to Present
1921 to 1951
1951 to 1981

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