Which region is located south of the caucasus mountains

it includes Southwestern Russia and northern parts of Georgia and Azerbaijan. The Transcaucasus is bordered on the north by Russia, on the west by the Black Sea and Turkey, on the east by the Caspian Sea, and on the south by Iran. It includes the Caucasus Mountains and surrounding lowlands.

Ithink the answer to that would be b):

Answerequatorial guinea,gabon, and western sahara;