The statement a patent applicant must demonstrate that an invention is useful to receive a patent is : False.
Patent can be defined the property right given to a person for inventing something. This property right means the person who invent something is owns it or the person is the legal owner of it.
The statement is false based on the fact that a patent applicant does not have to demonstrate that an invention is useful to receive a patent.
Therefore the correct option is B.
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