Which of the following seas does not have a coastline?

Which of the following countries does not have a land border with the Dead Sea?

Which one of the following countries does not share a border with the Caspian Sea?

Which one of the following is not correct about Sargasso Sea?

Which one of the following African countries does not border with the Mediterranean Sea?

Which one of the following countries of South-West Asia does not open out to the Mediterranean Sea?