This famous waltz is about a river that flows from Germany to the Black Sea, and is the longest river in Croatia:

This famous waltz is about a river that flows from Germany to the Black Sea, and is the longest river in Croatia:

A My Violet Volga
B Rose of the Rhine
C The Blue Danube

Johann Strauss II’s ‘An der schönen blauen Donau’ was not a hit on its release in 1867, but has enjoyed great success since, including a memorable turn in Stanley Kubrick’s ‘2001: A Space Odyssey.’

The correct answer is The Blue Danube.