Which one of the following is a landlocked country?

Which one of the following is a landlocked country?

Mali
Libya
Angola
Gabon
This question was previously asked in
UPSC Geoscientist – 2022
Mali is a landlocked country located in West Africa. It is bordered by Algeria, Niger, Burkina Faso, Cote d’Ivoire, Guinea, Senegal, and Mauritania, none of which provide access to the sea.
A landlocked country is a sovereign state entirely enclosed by land, or whose only coastlines lie on closed seas (like the Caspian Sea).
Libya, Angola, and Gabon all have coastlines providing access to the sea (Mediterranean Sea for Libya, Atlantic Ocean for Angola and Gabon). There are 44 landlocked countries in the world.