The correct answer is A) leading a rebellion against Ottoman rule in Greece.
Alexander Ypsilantis was best known for leading a rebellion against Ottoman rule in Greece.
Alexander Ypsilantis (1792-1828) was a Greek Prince and courageous politician who was the leader of a secret organization in Greece that conspired against the Ottoman Empire. The name of the organization was Filiki Eterea that supported the independence war against the Ottomans.