Characteristics clinical manifestation of schizophrenia are:
All the options are symptoms of schizophrenia. however, if the question asks about characteristic abnormality. the best answer is formal thought disorders. If a paicular formal thought disorder needs to be chosen, the best answer would be neologism
Formal thought diosrder
Delusions
Auditory hallucinations
Visual hallucinations
Schizophrenia Spectrum and Other Psychotic Disorders