Explanation

Saudi Arabia is the largest Middle Eastern country by area.

Most Middle Eastern countries (13 out of 18) are part of the Arab world.

The most populous countries in the region are Egypt, Turkey, and Iran, Saudi Arabia 

while 

The largest country in the world is Russia with a total area of 17,098,242 Km² (6,601,665 mi²)

ND-18-8-2023