<prompt> Delusion is not a feature of?DepressionAnxietySchizophreniaMania  <response>: Ans. is b i.e., Anxiety Delusion A delusion is false, firm unshakeable belief that is not accepted by other members of patients culture and society. To the patient, there is no difference between a delusional belief and a true belief-they are same experience. Therefore, only external observer can diagnose a delusion. The delusion is false because of faulty reasoning. It is out of keeping with the patients social and cultural background. It is firmly held unshakable despite objective and obvious contradictory proof or evidence, and despite the fact that other members of culture do not share the belief. Delusions are seen in psychosis Schizophrenia, Mania, depression, other psychotic disorder-delusional disorders and schizoaffective disorders and organic mental disorders Delirium, substance abuse or withdrawal. Delusions are not seen in neurosis Anxiety, obsessive - compulsive disorder, Dissociative conversion disorders, somatoform disorders, stress related disorders 