World Geography
The HBJ Upgradation project, upgraded the capacity of HBJ pipeline from 18.2 MM SC MD to

22.3 MM SC MD
33.4 MM SC MD
29.6 MM SC MD
20 MM SC MD

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

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

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