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: Dental
[{'content': 'All of the following drugs can worsen psoriatic lesion, except – \nSelect and explain. \nA. Chloroquine, B. Beta-blockers, C. Acitretin, D. Lithium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Acitretin is used in the treatment of psoriasis.', 'role': 'assistant'}]