World Geography
Which among the following statements is/are correct about Fronts?The boundary zone when two different type of air masses meet is called a Front.Differences in terms of tem­perature, humidity, precipitation, cloudiness, and wind direction are experienced along different fronts.Occluded front is formed when cold front over­takes warm front and warm air is completely displaced from the ground surfaceSelect the correct code from the options given below:

Only 1
None of these
1, 2 & 3
Only 1 & 2

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World Geography
Which among the following statements is/are correct about the symbiotic life of Corals?Algae gives carbon dioxide and other substances the  coral polyp needs.Coral polyp gives off oxygen and other nutrients that the algae needs.Select the correct code from the options given below:

Both 1 & 2
Neither 1 & 2
Only 1
Only 2

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

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

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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
1891 to 1921
1951 to 1981
1981 to Present

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