Multiple choice general knowledge Which one of the following pairs is not correctly matched ?(City and associated river) Berlin -- Rhine London -- Thames New York -- Hudson Vienna -- Danube Reveal answer Fill a bubble to check yourself A Correct answer Explanation Berlin is on the River Spree, NOT the Rhine. The Rhine flows through cities like Cologne, Basel, and Rotterdam. All other pairs are correct: London-Thames, New York-Hudson, Vienna-Danube.