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
[{'content': 'All are seen in general anxiety disorder (GAD), EXCEPT: \nSelect and explain. \nA. Muscle tension, B. Irritability, C. Fear of impending doom, D. Restlessness', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Restlessness, easy fatigue, difficulty concentrating, irritability, muscle tension and sleep disturbance are features of generalised anxiety disorder. Fear of impending doom is a symptom of panic attack or panic disorder.', 'role': 'assistant'}]