Yes, Mauritania is a country in Africa.
Mauritania's coastline is about 7x that of Benin, so Mauritania.
Mali, not Mauritania, is landlocked.
Mauritania is an Islamic country situated in Northern Africa.
Mali, not Mauritania, is landlocked.
No
Mauritania
That is the correct spelling of "Mauritania" (the largest country on the west coast of northern Africa).
Mali
The three of them are.
Morocco
No. It is a county in Africa.