Concept:Dead weight national debt is debt that is not backed by any real or productive asset.
Explanation:Governments sometimes borrow to meet current expenses or urgent needs.
This type of borrowing does not create an enduring asset such as roads, schools, or factories.
Because no tangible asset stands behind the loan, the debt becomes a burden on the nation.
This is why such national debt is called "dead weight."
Among the given options, this meaning is correctly expressed by saying it is not covered by any real asset.
Answer:D. not covered by any real asset