Abyssinia is the old name of which country?

A. Saigon
B. Constantinople
C. Ethiopia
D. Mesopotamia

The old name of Ethiopia

Abyssinia is the old name of Ethiopia.

Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country in East Africa. Ethiopia is the 12th most populous country in the world, the second-most populous nation on the African continent (after Nigeria), and the most populous landlocked country in the world. The country has a total area of 1,100,000 square kilometers (420,000 sq mi). Its capital and largest city are Addis Ababa.