World Geography
The ionosphere contains ionized air that protects the earth from

None of these
the ultraviolet rays of the sun
the infrared rays of the sun
the falling meteorites

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

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,
It is a deep depression in a stream bed at the base of a waterfall
It is created by the erosional forces of cascading water

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World Geography
Which among the following countries is the largest producer of cotton?

Russia
US
India
China

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