Answer:
The correct answer is:
Greece won independence from Turks in 1830
Step-by-step explanation:
Greece fought for independence from the Turks from 1921 to 1930 with the help of Russia, but at that moment Serbia was not part of Greece's independence. Because we are talking about Greece's independence, not the first war of the Balkans in which Serbia, Bulgaria, Macedonia, and Greece fought united against the Ottoman empire to gain control over the European territory the ottoman empire controlled. On that occasion, Russia helped both, but there were 4 countries in total looking for independence. Russia shares Slavic language and Orthodoxy claims in Serbia but not in Greece.