World Geography
Ultrasound which is upper limit of human hearing is characterized by which of the following frequencies?

Above 2 KHz
Above 200 KHz
Below 20 KHz
Above 20 KHz

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World Geography
Which among the following pairs of volcanoes is/are correctly matched?Mount St. Helens – United StatesMount Vesuvius – ItalyMount Krakatoa – IndonesiaSelect the correct code from the options given below:

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

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