Where was the final battle fought between Athenians and Xerxes?
A. Marathon
B. Salamis
C. Saratoga
D. Somme

Hint: The final battle between Athenians and Xerxes was fought on an island off the coast of mainland Greece. This battle was very significant as for the Greeks it was a great victory and the Persians were completely annihilated.

Complete answer:The union of Greece city-states under Themistocles and the Persian Empire under King Xerxes in 480 BCE fought a naval battle. This battle came to be known as the Battle of Salamis and the outnumbered Greeks won the battle.
In the straits between the mainland and Salamis, the combat took place, an island in the Saronic Gulf near Athens is Salamis.
Xerxes, the Persian king was keen for a decisive battle. Also, The number of Greek Allies was huge and the Athenian general Themistocles convinced the Greek Allies to bring the Persian caravan to the battleground. The General was hoping that a victory would ensure the prevention of naval operation against the Peloponnese.
While talking about the other options,
A. The battle that was fought on the plains of Marathon, in this battle, the Athenians managed to repulse the first Persian invasion of Greece in a single afternoon came to be known as the Battle of Marathon.
C. The battle of Saratoga was the decisive battle fought between the Americans and British in which Americans won.
D. The armies of the British Empire and French third Republic fought against the German Empire and which came to be known as the Battle of Somme. This was a battle of the First World War.

Thus the correct option is B.

Note: A step was taken by Themistocles to deceive the Persian fleet and to block both entrances the Persian navy rowed into the Straits of Salamis. The conditions of the Straits became cramped and the Persian fleet was an effective impediment as the ships battled to handle and thus became chaotic. The Greek fleet seized the opportunity and scored a decisive triumph.