Solution:Match List-I (River) with List-II (Country of Origin):A. Karun → IV. Iran – The Karun River is the longest river in Iran, originating in the Zagros Mountains.
B. Amazon → III. Peru – The Amazon River originates from the Andes Mountains in Peru before flowing across Brazil.
C. Volga → II. Russia – The Volga River, Europe’s longest river, originates in Russia.
D. Mahaweli → I. Sri Lanka – The Mahaweli River is the longest river in Sri Lanka, originating from the Central Highlands.
Correct matching: A–IV, B–III, C–II, D–I.