Which of the following is NOT a governmental right concerning real property?

A leasehold estate is a type of property interest but is not a governmental right concerning real property. It represents a tenant's right to occupy and use a property for a specified period under a lease agreement. Unlike police power, eminent domain, and taxation, which are rights exercised by the government to regulate or obtain property for public use, a leasehold estate is a private arrangement between a landlord and a tenant.

Police power refers to the government’s ability to regulate property to promote public health, safety, and general welfare. Eminent domain allows the government to take private property for public use, provided there is just compensation. Taxation is the government's right to levy taxes on property to fund public services. Thus, the leasehold estate stands apart as a private interest, making it the correct answer to the question.