1 is correct.Volga river does not drain into the Black Sea.The Volga is the longest river in Europe. It is also Europe's largest river when it comes to discharge and drainage basin.The river flows through central RUSSIA and into the Caspian Sea.The Dnieper is one of the MAJOR rivers of Europe.It rises in the Valdai HILLS near Smolensk, Russia, and flows into the Black Sea.Don is one of the major Eurasian rivers of Russia and the fifth-longest river in Europe. It drains into the black sea.The Danube is Europe's second-longest river, after the Volga.