Ans. is 'b' i.e., Panic attack o Panic attack may present like angina / MI e.g. palpitation, sweating, dysnea, chest discomfort or pain.Panic disordero Panic disorder is characterized by intermittent sever anxiety (Panic) unrelated to any particular situation or object. A panic attack has following characteristics:-i) Discrete episode of intense fearii) Abrupt onset (sudden onset).iii) Reaches as maximum within few minutes and lasts for some minutes.iv) At least four of the following symptoms:-1) Palpitation2) Sweating3) Shortness of breath (Breathlessness)4) Feeling of choking5) Chest pain or discomfort (chest constriction)6) Nausea or abdominal distress7) Trembling or shaking8) Dizziness, unsteady, fainting9) Derealization or depersonalization10) Fear of losing control11) Fear of dying (impending doom)12) Paresthesias13) Chills or hot flushes.v) At least one of the attack is followed by 1 month (or more) of one (or more) of the following:-a) Persistent concern of future attacks.b) Worry about the consequences of attacks (Heart attack, Stroke)c) Significant change in behavior related to attack.