Which of the following is a common anxiety disorder?

Panic Disorder is indeed classified as a common anxiety disorder. It is characterized by recurrent and unexpected panic attacks, which are sudden surges of intense fear or discomfort that peak within minutes. Individuals experiencing panic disorder often develop a fear of having more attacks, leading to significant changes in behavior or avoidance of situations that they associate with previous panic attacks. This disorder falls under the umbrella of anxiety disorders, which are primarily defined by excessive fear or anxiety responses.

Bipolar Disorder is classified as a mood disorder, which involves mood swings ranging from depressive lows to manic highs, rather than anxiety. Schizophrenia is a severe mental disorder that affects how a person thinks, feels, and behaves, leading to distortions in thinking and perception. Obsessive-Compulsive Disorder, while also related to anxiety, has distinct features involving intrusive thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) performed in response to those obsessions.

By understanding these classifications, it's clear why Panic Disorder is recognized as a common anxiety disorder compared to the others listed.