Which of the following disorders is characterized by sudden and unpredictable episodes of distress?

A) social anxiety disorder
B) panic disorder
C) obsessions
D) compulsions

Panic Disorder

An anxiety disorder marked by unpredictable, minutes-long episodes of intense dread in which a person may experience terror and accompanying chest pain, choking, or other frightening sensations; often followed by worry over a possible next attack.

Unpredictable Episodes

Occurrences or incidents that happen without warning or forecast, often making it difficult to prepare or adjust.

Distress

Negative stress that is associated with anxiety, depression, and other negative emotional states.