Yom-Kippur War (also known as October War) was fought in

Answer: Option A

The correct answer is Option A: 1973.
Let's break down why:
The Yom-Kippur War, also called the October War, was a major conflict that occurred in the Middle East.
It began on October 6, 1973, which is why it's also known as the October War.
Egypt and Syria launched a surprise attack on Israel during the Jewish holiday of Yom Kippur.
Therefore, the war definitely happened in 1973.
The other options (1978, 1975, and 1965) are incorrect because they don't match the actual year of the Yom-Kippur War.