World Geography
The imaginary line on the earth's surface, which closely follows the 180o meridian, is called the

Tropic of Cancer
Equator
Prime Meridian
International Date Line

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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
All of these
flood controls and making rivers navigable
power generation by constructing hydro power stations

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World Geography
Which among the following principle is used by Bats?

RADAR (Radio Detective & Ranging
law of reflection
law of diffraction
SONAR (Sound Navigation & Ranging

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