World Geography
Which among the following statements is/are correct about the stratosphere?The Stratosphere is the layer of the Earth’s atmosphere which lies beyond the mesosphere.It extends up to an altitude of 50 kilometres from the earth’s surface.This layer is ideal for flying aeroplaneSelect the correct code from the options given below:

Only 1 & 2
1, 2 & 3
Only 1
Only 2 & 3

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

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

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