Darcy is sitting at her desk in her office one day when, without warning, her heart begins racing rapidly, she has a sensation of being "out of her body," and she experiences dulled vision and hearing,

rapid breathing, and sweating. She thinks she is having a heart attack. Nothing she is doing seems to have caused such an episode. Her symptoms MOST resemble ______.
a) a phobic disorder
b) a panic attack
c) post-traumatic stress
d) an affective disorder

ANS: b