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
Pappu, a 49-year male complained of sudden onset of palpitation and apprehension. He is sweating for last 10 minute and fears of impending death. Diagnosis is - 
Select and explain. 
A. Hysteria, B. Cystic fibrosis, C. Panic attack, D. Generalized anxiety disorder
C: Panic attack
Answer: C: Panic attack 
Explanation: None