(B) Antarctica is the only continent among all seven which doesn't have any countries as it is not habitable due to its harsh weather conditions. Antarctica has been declared an international land by the "United Nations".
The answer to the question is letter B or Antarctica if we are talking about which CONTINENT has no independent countries. Africa, South America, North America, Australia Europe and Asia all have independent countries or states and some of the independent countries are as follows: Afghanistan, Albania, Algeria, Angola, Australia, Austria, Bahrain, Barbados, Belarus, Belgium, Bolivia, Brazil, Burundi, Cambodia, Chile, Taiwan, Costa Rica, Denmark, France, Gabon, Honduras, Hungary, Indonesia, Laos, Maldives, Mexico, Netherlands, New Zealand, Peru, Russia, United States and Venezuela.
Antarctica doesn’t have any independent countries because it is just one place covered in ice. It covers a total area of 14,000,000 square kilometers and there are no reported permanent residents in the continent although there are more or less than 5,000 temporary residents who are either visiting the continent or doing some research.