Johnny has recurring periods of intense fear during which he thinks that he is having a heart attack. He trembles and has a rapid heart rate. These symptoms indicate:

A) panic attack.
B) posttraumatic stress disorder.
C) agoraphobia.
D) generalized anxiety disorder.

Panic Attack

A sudden episode of intense fear or anxiety that triggers severe physical reactions when there is no real danger or apparent cause.

Posttraumatic Stress Disorder

A psychiatric disorder that may occur in people who have experienced or witnessed a traumatic event, characterized by severe anxiety, flashbacks, and uncontrollable thoughts about the event.

Agoraphobia

A disorder characterized by an extreme or irrational fear of entering open or crowded places, of leaving one's own home, or of being in places from which escape is difficult.