The correct answer is Option 1. Explanation & Key Takeaways: Rhine: • It is one of the longest and most important rivers in Europe. • It flows through six countries -Switzerland, the Principality of Liechtenstein, Austria, Germany, France and the Netherlands. • Length: 1,232 km • Source: Swiss Alps • Confluence: the North Sea at Rotterdam. • Cities on bank: Bonn, Cologne, Düsseldorf, Rotterdam, Strasbourg and Basel. Rhone: • It is the only major river flowing directly to the Mediterranean Sea. • It flows through Switzerland and France. • Length: 813 km. • Source: Rhone Glacier, Switzerland • Cities on its bank: Oberwald, Geneva, Sierre, Lyon, Pont-Saint-Esprit etc. Dnieper: • It is the fourth-longest after the Volga, Danube, and Ural. • It flows through Russia, Belarus, Ukraine. • Length: 2,200 km • Source: Valdai Hills of Russia • Confluence: Black Sea • Cities on bank: Kiev, Smolensk,Orsha, Shklow, Mogilev. Seine: • Length: 780 kilometres • Source: Côte d’Or region of Burgundy • Confluence: Into the English Channel between Normandy's Honfleur and Le Havre. • Cities on the bank: Paris, Vernon, Giverny, Les Andelys etc.