Final answer:
Hypochondriasis (C) is not classified as an anxiety disorder, unlike the other listed conditions. It is categorized as a somatic symptom and related disorder, focusing on excessive worry about having a serious illness.
Step-by-step explanation:
The question asks which of the following is not an anxiety disorder: (A) Phobias, (B) Panic, (C) Hypochondriasis, (D) Obsessive-compulsive, (E) Post-traumatic stress. The correct answer is (C) Hypochondriasis. Unlike the other options, hypochondriasis, also known as illness anxiety disorder, is characterized by an excessive worry about having a serious illness, which causes significant distress or impairment to the individual. It is not classified strictly under anxiety disorders; instead, it is categorized under somatic symptom and related disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5).
Anxiety disorders are defined by feelings of excessive fear and anxiety, and they include phobias, panic disorders, obsessive-compulsive disorder (OCD), and posttraumatic stress disorder (PTSD). These disorders are typified by significant worry and fear that persist for months and can lead to considerable distress and dysfunction in everyday life.
Anxiety disorders are a group of mental disorders characterized by excessive worry, fear, or anxiety. Based on the given options, hypochondriasis is not an anxiety disorder. Hypochondriasis, also known as illness anxiety disorder, is characterized by excessive worry about having a serious illness, despite having no or only mild symptoms.