World Geography
The knowledge about the topography of the ocean basins has been derived from

echo sounder
side-scan sonar
All of these
seismic surveying

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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:

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

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