World Geography
The main objective of multi-purpose river projects are

extension of irrigation facilities by constructing dams to store surplus water during the rainy seas
flood controls and making rivers navigable
All of these
power generation by constructing hydro power stations

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

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

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