Q. Which country's longest river is the "Thjorsa River"?
Answer: Iceland
Notes: "Thjorsa River" is Iceland's longest river at 230 kilometres. It is in the south of the island. It is a glacier river and has its source on the glacier Hofsjokull. It flows out through narrow gorges in the highlands of Iceland.

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📌 Question Number: 183 in Physical Geography - Important Rivers, River Islands, Deltas and Lakes in the above course in App.