Final answer:
Obsessional compulsion neurosis refers to Obsessive-compulsive disorder (OCD), which is an anxiety disorder characterized by repetitive behaviors and unwanted persistent thoughts.
Step-by-step explanation:
The term 'obsessional compulsion neurosis' is best understood as a reference to Obsessive-compulsive disorder (OCD). OCD is a type of anxiety disorder where individuals experience persistent, unwanted thoughts (obsessions) that drive them to engage in repetitive behaviors (compulsions). These behaviors are performed in an attempt to prevent or reduce anxiety or a dreaded event or situation, despite being excessive or not realistically related to the issue they're intended to address. The other listed conditions, such as Generalized anxiety disorder, Panic disorder, and Social anxiety disorder, also fall under the umbrella of anxiety disorders, but they are distinct in their symptomatology and the kinds of fear and anxiety they produce.
Both genetic and environmental factors contribute to the development of OCD, and family studies have shown a genetic link in many cases. Neurobiological studies have associated OCD with abnormalities in certain areas of the brain, indicating that it stems from a complex interaction between neurobiological factors and environmental influences.