A somatic symptom disorder marked by a preoccupation with a fear or belief of having a serious disease in the face of either no or minor medical symptoms and excessive behaviors related to this belief is disorder. A. dissociative identity
B. somatic symptom
C. conversion
D. illness anxiety

A somatic symptom disorder marked by a preoccupation with a fear or belief of having a serious disease in the face of either no or minor medical symptoms and excessive behaviors related to this belief is D. illness anxiety disorder.

Explanation:

Illness anxiety disorder is probably better known as hypochondriasis. People who have this disorder display excessive fear or worry about being sick. Often, they do not have any physical symptoms. They can also misinterpret normal body sensations or minor symptoms, attributing their cause to a grave illness. People with this disorder refuse to believe they are healthy, even though tests do not reveal anything confirming their supposed illness.

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