The greatest known ocean depth (which lies in the Pacific Ocean) is ________

Which one among the following best explains the reason for the eastern and western boundaries of the Pacific Ocean experiencing frequent earthquake?

The oceanic current named as 'Kuroshio - Kurile and Alaskan' are located in

Which one of the following cities is associated with the river Mekong ?

The most important navigable river in, Central Europe that provides a link between seven countries-Austria, Belgium, Czech Republic, Hungary, Rome, Russia and Yugoslavia is ________

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