Which of the following disorders is characterized by preoccupation with the idea of having a serious disease?

Question

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Illness anxiety disorder, formerly known as hypochondriasis, is characterized by preoccupation with the idea of having a serious disease despite the absence of any physical symptoms or evidence of illness. This preoccupation can cause significant distress and impairment in daily functioning. Dissociative disorder involves a disruption in consciousness, memory, identity, emotion, perception, body representation, motor control, and behavior. Conversion disorder involves the manifestation of physical symptoms without any underlying medical or neurological condition. Somatization disorder is a chronic condition in which a person experiences multiple physical symptoms over a period of several years that cannot be attributed to any specific medical condition.

Which of the Following Disorders Is Characterized by Preoccupation with the Idea