World Geography
Which among the following statements is/are correct about Dust particles in the Earth’s atmosphere?Higher concentration of dust particles is found in equatorial and polar regionsThey are generally found in the lower layers of the atmosphereSelect the correct code from the options given below:

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

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World Geography
In which rocks does most of the formation of caves take place?

Sandstone
Granite
Quartzite
Limestone

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