This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
A patient presented in casualty with a history of sudden palpitation, the sensation of impending doom and constriction in his chest. This lasted for about 10-15 minutes after which he became all right. The diagnosis is likely to be - 
Select and explain. 
A. Phobia, B. Personality disorder, C. Generalized anxiety disorder, D. Panic attack
D: Panic attack
Answer: D: Panic attack 
Explanation: Sudden onset of palpitation, sense of impending doom, and constriction in chest lasting for 10-15 minutes suggest the diagnosis panic attack.