49th Parallel is the boundary line between which two countries?
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The polar regions are sparsely populated because of
The hills, namely Black, Blue and Green Hill, are located in which country?
The weight of an object is maximum
The Lena river passes through which country?
What process takes place during the youthful stage of a river?
The Gurudwara 'Panja Sahib' is located in which neighbouring country of India?
A stretch of sea water, partly or fully separated by a narrow strip from the main sea is called