Question

A person acts extremely jealous all the time, and complains bitterly whenever other people appear to be getting more attention. this has been going on for a couple of months, and the person shows no other substantial symptoms. the best diagnosis, assuming the extreme jealousy has no basis in fact, is:

Answer 1

 the best diagnosis, assuming the extreme jealousy has no basis in fact, is: Delusional disorder
A delusional disorder is a form of psychological disorder which caused the patient to replace a reality with their own perception, no matter whether the reality is matched with their perception or not