Answer: Paranoid
Explanation: Individual's with paranoid personality disorder are usually paranoid, a condition whereby one becomes unnecessarily but consistently suspicious of other people. Peoe who suffer from paranoia find it very difficult to trust and are constantly not comfortable with other people's attitude even when such individual showcases good and unquestionable conduct. Paranoid personality disorder may be a result of various biological and psychological factors which triggers an inflexible and stubborn belief of being trailed or focused without any peculiar reason.