World Geography
Which among the following statements is/are correct about Population of the world?In the twentieth century itself the population has increased four times.Human population increased more than ten times in the past 500 hundred years.World population exploded in the eighteenth century after the Industrial Revolution.Select the correct code from the options given below:

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

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World Geography
Which among the following statements is not correct about Plunge pool?

It is created by the erosional forces of cascading water
It is a deep depression in a stream bed at the base of a waterfall
They occur at the mature stage of the river development
They are often very deep, generally related to the height of fall and the volume of water,

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