Which of the following is not true concerning the usage of public land. a. public land is managed by federal and state agencies. b. unprotected lands exist inside federal parksc. public land can be protected or unprotected. d. wilderness areas and state parks are protected.

The correct option is this: UNPROTECTED LAND EXIST INSIDE FEDERAL PARKS.

Lands generally belong to three categories of owners, these are federal government, state government and private owners. The lands belonging to the federal and the state governments are considered to be public lands and they are always protected; the lands can not be used for any purpose by anybody unless permission is first obtained from the government. Public lands are typically used for construction of social infrastructures that will benefit all.