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': 'Anxiety is manifested by following, except: \nSelect and explain. \nA. Impaired concentration, B. Pupillary constriction, C. Insomnia, D. Worry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pupillary constriction', 'role': 'assistant'}]